I have a Snapper self propelled walk behind with a ninja blade on it.
I sold a craftsman 5hp with a mulch blade to get this and I regret it.

My yard is oval, and as I make my turn at the end, the Snapper leaves
high spots on the inside cut. It is like the deck is lifting while in
the slo curve. My craftsman never did this. The only cure it to cut
back and forth rather than in a circle.

Is it the funky ninja blade?