I can't really tell if it is a Cansoft version or if it's full metal....
Did you notice that the hammer has started to sit higher when cocked?
That could mean that if you have a Cansoft frame, it could have started cracking....take the slide off and look for cracks.
Anyways...I had the same problem with it.
I lubed my gun. I also had to change my Cansoft midframe.
As for the second thing...I don't think that means anything, but I'm not sure. Mine does the same thing...
VFC Saber SD Urban Grey - VFC SCAR-L Tan - KWA MP7 Tan
WIP: Magpul FPG Conversion to TM Specs (currently KWA Spec)