When I put in a zombie spawner sometimes only one will spawn and that zombie has a gun. Then after I kill it the rounds keep going without zombies spawning. But then other times zombies wont spawn at all. What do I do to fix this?

Well after doing more research I had found that on some of the UGX youtube videos people were also asking and from one of the replies you are able to get the capt price model when you hit level 50. I wish challenges and ranks carried between maps though. That might be something that I would work on ...

I was looking at the customization screen and there was some stuff in there that wasn't in the challenges listed. For example the Capt. Price character was there but there was no explanation on how to unlock it. How do I get some of these things.