Basically my question is this: do the assassins' "unique" status stop an army from having multiples in apocalypse?
Let me set the scene: I had forgotten to deploy my Vindicare at the start and as a result he had to wait until late game to enter play. In our turn 3 I brought him on to try and strip a hull point or two from some superheavies I was trying to kill. My flyers had dropped a shadowsword that was threatening my Titans down to a single hull point and I figured it would be pretty epic for the assassin to take the final one and detonate the sucker. He strolled on 6", lined up the side of the shadowsword and rolled a hard 6 for the snapshot! I was stoked! Then, I rolled the 4d6 for the turbo penetrator (he he...) and got 17! KABOOM went the shadowsword! This was exactly when an opponent piped up and said "bad luck mate, doesnt count, you can't have two Vindicares in an army".
I said "I don't, I only have one".
Him- "Yeah, but your teammate has one, they're unique units, only one is allowed in an army".
Me- "But it's apocalypse... Random teams..."
Him- "Yeah, but that's like saying you could take a unit of ten Eldrads".
Me- "Not really... You're saying there's only a single one of each assassin in the entire universe?"
Him- "Yep, you can't do it."
Me- "$&?@. Alright then, RAW, I guess ill put him away
"
Him- "Nah, don't worry, it's only a friendly".
Me- "But... you just... I don't... Why the hell did you even bring it up?"
Him- "don't worry, it's just a friendly".
Me- "well how 'bout we roll off?"
Him- "nah, it's a friendly, just keep the result"
Me- "Right..."
I think the dice gods were with me after that as the next thing I did was smoke another shadowsword and a Baneblade with some epic shooting from my Reaver, and nailed a doomhammer with my Warhound. 4 superheavies in one turn!
Anyway... My understanding was that in appcalypse that sort of uniqueness didnt count, and it was just to represent how rare assassins were in regar 40k. Obviously I wasn't about to charge 5 Marneus Calgars out of a land raider but come on...
So, has anyone come up against this sort of issue from either side? How did you resolve it? What do people think?