Yashica Mat LM with Fuji Pro 160

So I took my 120 film to get developed.  I had been taking random pictures to test out my Yashica Mat TLR camera that I bought awhile ago.  I was really excited to go pick up the pictures from the photo lab today because I didn't know how they were going to turn out... since this is my first time shooting with a medium format camera.  To my surprise, the pictures turned out okay.  The only thing I was dissapointed about was that only 8 shots were developed.  A 120 film has a total of 12 exposures.  So what's going on?! So I looked at my film negatives and found out that my camera has film framing problems... meaning every time I crank the advance, it's inconsistant with the amount of film it pulls... therefor giving me less shots.  I really wanted to see my last 4 shots which did not come out because I was basically shooting nothing, since the film was already done and rolled up.  My last 4 shots were basically shots I did up at this hill called Suicide Hill... it was really beautiful up there and I was really hoping that the pictures turned out okay.. but yea it didn't even turn out haha.  Anyways here are some of the shots that did develop.  I'm thinking about getting this old Yashica made in the 50s serviced, but that's probably going to cost me another $160 or so... so I'll have to think about it..............