Map markers are meant to have unique names. However, it is possible to have player-created map markers with non-unique names.

Player-created markers are systematically named using the following convention: "_USER_DEFINED #12345678/n" where:

• 12345678 corresponds to the DirectPlay ID or _id from OnPlayerConnected/OnPlayerDisconnected
• n corresponds to an incrementing number starting with 0

When a player disconnects and reconnects, the n or incrementing marker number restarts at 0.

What this means is that if a player already has player-created map markers in-game before he disconnects, the same player can create non-unique markers after reconnecting.

Perhaps this is a locality issue because objects are returned to the server when a player disconnects. But that said, the non-unique markers will be transferred to the server when the player disconnects a second time.