The back latch seems alittle loose I can here the top moving alittle on that side.  Is there anyway to adjust those stock latches?

The only thing I can think of is to shave a bit off the bottom of the bracket, maybe 1/16" at a time.
I think they just move around anyway, they are sitting on rubber Both of mine moved, and squeaked etc. You should see about 1/8" - 1/4" gap around the outside between the top and the metal(targa area)