Cutting problem? When I had a bad cut with the mower I would check to make sure deck is clear of clumps of grass. Also sometimes my blades would be dull.
In another instance all those items would be fine, then I would try crosscutting the yard and find that some lawns are very uneven.
The only other problem I had was the bolts that lower the deck would loosen and make the deck uneven when it cut. It just happened last week and I put locking nuts on the screw. Don't know why they would not do that in the first place. oh well Good Luck