diff --git a/output/js/util.js b/output/js/util.js
index d5d41528..7cb8d0c6 100644
--- a/output/js/util.js
+++ b/output/js/util.js
@@ -245,7 +245,10 @@ const TRANSFORMATION = {
 	numeric: (el) => parseInt(el.innerText),
 	casefold: (el) => el.innerText.toLowerCase().trim(),
 	getName: (_, row) => dom.row_info(row).name.toLowerCase(),
-	getRoomPublicKey: (_, row) => dom.row_info(row).public_key
+	getServerId: (_, row) => {
+		const rowInfo = dom.row_info(row);
+		return `${rowInfo.public_key}${rowInfo.join_link}`;
+	}
 }
 
 /**
@@ -256,7 +259,7 @@ export const COLUMN_TRANSFORMATION = {
 	[COLUMN.IDENTIFIER]: TRANSFORMATION.casefold,
 	[COLUMN.NAME]: TRANSFORMATION.getName,
 	[COLUMN.DESCRIPTION]: TRANSFORMATION.casefold,
-	[COLUMN.SERVER_ICON]: TRANSFORMATION.getRoomPublicKey
+	[COLUMN.SERVER_ICON]: TRANSFORMATION.getServerId
 }
 
 /**
diff --git a/php/fetch-servers.php b/php/fetch-servers.php
index 1eefa0c1..a29d8e42 100644
--- a/php/fetch-servers.php
+++ b/php/fetch-servers.php
@@ -48,8 +48,8 @@
 		// Fetch server data and filter unreachable servers.
 		$servers = CommunityServer::poll_reachable($servers);
 
-		// Merge servers with the same public key.
-		$servers = CommunityServer::dedupe_by_pubkey($servers);
+		// Merge servers with the same public key and rooms.
+		$servers = CommunityServer::dedupe_by_data($servers);
 
 		// Fill additional information from sources.
 		CommunityServer::source_additional_info($servers, $sources);
diff --git a/php/servers/servers-rooms.php b/php/servers/servers-rooms.php
index 3d0eb7a1..3bf2b71e 100644
--- a/php/servers/servers-rooms.php
+++ b/php/servers/servers-rooms.php
@@ -296,14 +296,14 @@
 		}
 
 		/**
-		 * Sort Community rooms in-place by their server's public key.
-		 * @param CommunityRoom[] $rooms Rooms to sort by server pubkey.
+		 * Sort Community rooms in-place by their server.
+		 * @param CommunityRoom[] $rooms Rooms to sort by server.
 		 */
-		public static function sort_rooms_by_pubkey(array &$rooms) {
+		public static function sort_rooms_by_server(array &$rooms) {
 			usort($rooms, function(CommunityRoom $a, CommunityRoom $b) {
 				return strcmp(
-					$a->server->get_pubkey(),
-					$b->server->get_pubkey()
+					$a->server->get_pubkey() . $a->server->get_hostname(),
+					$b->server->get_pubkey() . $b->server->get_hostname()
 				);
 			});
 		}
@@ -493,7 +493,7 @@
 		 * @param string $matchee String matching room. Output parameter.
 		 * @return bool True if the array matches the Community, false otherwise.
 		 */
-		public function matched_by_list(array $filter, string &$matchee): bool {
+		public function matched_by_list(array $filter, string &$matchee = null): bool {
 			foreach ($filter as $filter_item) {
 				if ($this->matched_by_identifier($filter_item)) {
 					$matchee = $filter_item;
@@ -510,7 +510,7 @@
 		 * @param string[] $matchees output parameter
 		 * @return CommunityRoom[]
 		 */
-		public static function select_rooms(array $rooms, array|string $filter, array &$matchees): array {
+		public static function select_rooms(array $rooms, array|string $filter, array &$matchees = null): array {
 			$_matchees = [];
 			$rooms = array_values(array_filter($rooms, function(CommunityRoom $room) use ($filter, $_matchees) {
 				$matchee = null;
@@ -687,10 +687,10 @@
 		case SameHostname;
 
 		/**
-		 * @var SamePublicKey
-		 * Strategy considering two servers to be identical if they share a SOGS public key.
+		 * @var SameData
+		 * Strategy considering two servers to be identical if they share a SOGS public key and room data.
 		 */
-		case SamePublicKey;
+		case SameData;
 
 		/**
 		 * Determine whether two CommunityServer instances are identical under the given criteria.
@@ -700,8 +700,11 @@
 		 */
 		public function should_merge_servers(CommunityServer $a, CommunityServer $b): bool {
 			return match ($this) {
-				CommunityServerMergeStrategy::SameHostname => $a->get_hostname() == $b->get_hostname(),
-				CommunityServerMergeStrategy::SamePublicKey => $a->get_pubkey() == $b->get_pubkey()
+				CommunityServerMergeStrategy::SameHostname =>
+					$a->get_hostname() == $b->get_hostname(),
+				CommunityServerMergeStrategy::SameData =>
+					$a->get_pubkey() == $b->get_pubkey() &&
+					CommunityServer::rooms_in_common($a, $b)
 			};
 		}
 	}
@@ -801,6 +804,27 @@
 			usort($servers, 'CommunityServer::compare_by_pubkey');
 		}
 
+		/**
+		 * Return true whether the two servers given share a room.
+		 */
+		public static function rooms_in_common(CommunityServer $a, CommunityServer $b): bool {
+			// Rely on at least token or creation date differing.
+			// Do not strictly compare room lists because the servers
+			// may have been polled at different times.
+
+			$room_date_pairs = [];
+			$rooms = CommunityServer::enumerate_rooms([$a, $b]);
+			foreach ($rooms as $room) {
+				$room_date_pairs[] = $room->token . "+" . $room->created;
+			}
+
+			if (count(array_unique($room_date_pairs)) < count($rooms)) {
+				return true;
+			}
+
+			return false;
+		}
+
 		/**
 		 * Absorb candidates for the SOGS public key from a duplicate server instance.
 		 */
@@ -830,7 +854,7 @@
 					exit(1);
 				}
 				$this->merge_pubkeys_from($server);
-			} else if ($strategy == CommunityServerMergeStrategy::SamePublicKey) {
+			} else if ($strategy == CommunityServerMergeStrategy::SameData) {
 				if ($this->get_pubkey() != $server->get_pubkey()) {
 					log_error("SamePublicKey merging: Merged servers differ in public key");
 					exit(1);
@@ -919,10 +943,10 @@
 		 * @param CommunityServer[] $servers Servers to merge by public key.
 		 * @return CommunityServer[] Servers merged by public key-
 		 */
-		public static function dedupe_by_pubkey($servers) {
+		public static function dedupe_by_data($servers) {
 			CommunityServer::sort_by_pubkey($servers);
 
-			CommunityServer::merge_by($servers, CommunityServerMergeStrategy::SamePublicKey);
+			CommunityServer::merge_by($servers, CommunityServerMergeStrategy::SameData);
 
 			$servers = CommunityServer::ensure_merge_consistency($servers);
 
diff --git a/sites/index.php b/sites/index.php
index dfe350fe..5352f34d 100644
--- a/sites/index.php
+++ b/sites/index.php
@@ -22,7 +22,7 @@
 
 	// Sort rooms by name and then host.
 	CommunityRoom::sort_rooms_str($rooms, 'name');
-	CommunityRoom::sort_rooms_by_pubkey($rooms);
+	CommunityRoom::sort_rooms_by_server($rooms);
 
 	// Set the last-updated timestamp
 	// to the time the server data file was last modified.