respawning of immortals with large numbers ?

[Boron]

if you have a high horde of immortals (vampirehorde) and lots get killed in friendly dominion are always all respawned in friendly dominion or do always die some ( about 5-10% ) ? unfortunately i am bored by sp now because the ai is no challenge but forces you a bit to not play like you would play in mp because you need to defend against early rush i have no game for this to check at the moment .

but iirc in one of my first games for fun with a friend i used about 1500 vampires in our final fun battle when we experimented and most were killed but less respawned than the losses in the casualities report .
like 1000 killed but only 900 respawned .
did i just not watch close or are perhaps sometimes some not correct respawned ?