one of out c8035 units has a problem with the stacker unit not straightening the pages correctly when there are jobs larger than 10 pages. it's the exact same issue reported here (http://forum.support.xerox.com/t5/Hardware/Xerox-AltaLink-B8065-amp-B8090-Finisher-Stacking/m-p/2105...
Solved! Go to Solution.
Update the firmware as told in the other thread where you posted this.
Make sure the printer and finisher are level
the issue is not related to the firmware. this was a hardware issue. there are 2 rollers in the finisher unit (look inside above the stapler unit. one of the supports (very flimsy unsupported metal arm) was bent. this was verified and fixed the identical problem on 2 units.