Weird multiplayer "side" issue

[ADM Mako]

I've been working on a mission for a while now that has four possible randomly selected submarine enemy groups inside a dynamic group. The random selection works great - every time the mission starts only one of the 4 is selected.

Playable platforms are a single Frigate (choice of platform available) and an "in-flight" helicopter from the Frigate.

When I playtested this scenario, I only did it from the Frigate. Everything worked like I'd planned. So I sent it to one of the guys I play with so we could test it multiplayer.

However - in Multiplayer mode, something weird happens that I've never seen before.

Whatever submarine is selected by the random dynamic group selection shows up immediately when the game starts on the Nav map as a neutral contact. This happens for both the Frig and Helo.

After this occurred, I went offline and tested the scenario single player again with the Frig - and it worked normally (like it should - like it has before). Then I tested it by selecting the Helo. When the helo is selected in single player mode the submarine(s) immediately show up as contacts on the map - but as enemy, not neutral.

So, to sum up :

Single player - Frig: No subs show up until they are detected as normal contacts.
Single player - Helo: Subs show up immediately on Nav map as enemy submarine contacts.
Multi player - Frig or Helo: Subs show up as neutral contacts to both player platforms.

So... ahh, anyone have any ideas? I've made sure that the submarines are set as "side2" and they are enemies of "side1" (both sides at war with each other). I have two other dynamic groups that spawn random biologic and civilian shipping and they both work fine (all entities are either biologics or civilian neutrals in those groups).