Bit late to the party but are you still having problems with this?
I only did it quickly but I took your 'dispatch.meta' & threw it into my game & it looks to me like like everything is spawning. Take a look at the pics & see? (I'm not sure exactly who should be spawning etc but you'll know what you are looking for).
Note: I also edited your dispatch slightly after that & added the peds you appeared to be having problems with to just about every dispatch vehicle I could find so if you see anything weird/peds in wrong vehicle etc, that'll be why I also got female cops spawning although they're not in the pics.
Not sure what could be causing it in your game if you're still having issues but the first place I would look is 'peds.ymt'.
Here's my 'peds.ymt' for you to compare to yours & see if anything pops out at ya.
I'm also using Dispatch Ghost Fix that may or may not have something to do with it. Worth checking out in your game also, to see if it makes a difference
Hope something there^ helps anyway. Let me know how you get on