Unfortunately this mod is on hold and will need to be reworked.
Vindex brought to my attention that when you load a saved game, all the radio content that played previously back to the date your patrol started will play on the radio.
http://www.subsim.com/radioroom/showthread.php?t=112744
With testing, this seems to be due to pulling content for different stations from the same folder. This does not happen when you do not pull content for multiple stations from the same folder.
This whole mod is based on pulling content for stations from the same folder.
You can still use this mod, but when you load a saved game, you are going to hear old audio content all the way back to the date when your patrol started. So for now this mod is on hold.
Some possible fixes I'll be mulling over....Each station will get a separate folder, but this will mean duplicating content and the size of this mod will increase. Cutting down the number of stations. Dropping the whole multiple stations idea and doing a single all around the world Washington, BBC, and Tokyo station.
Right now I'm leaning towards the last option due to my experiences in game. I've found I'd rather sacrifice some realism and just have the radio heard anywhere on the map.