L4D2 Ragdolls disappear after reloading save

Hello guys! Gmod noob here, somewhat; I downloaded the L4D/2 survivors pack from http://www.garrysmod.org/downloads/?a=view&id=85166 and it has been working fine;
I put it in my addons folder, all ragdolls are poseable etc.

However, after saving a game with an L4D survivor ragdoll in it, I load the saved game later only to find it has disappeared and all my posing has gone down the drain! I tried with other ragdolls from other games and they don’t have the same problem.

I tried on gm_flatgrass and this is the result:

I posed(not really, more of just hung him there)Nick next to Spy, but he’s gone!

Oh wait, there he is!

You will have my eternal gratitude if you help me solve this, I think I read somewhere some others were having the same issue, but no solution. 8C