I have a 2026 JD X390 with 22 hrs. and a 54" hydraulic lift deck. The mower was delivered with the deck not adjusted from the dealer. I have an uneven cut that I can't figure out. I have leveled the deck front to back and side to side per manual with the optional JD leveling tool. The manual says to set at deck leveling position 2.5" and make adjustments. The blade tips are exactly at 2 1/2" after adjustment. I mow at 3", and again right at 3" with tool. Tires are properly inflated to the correct pressure. Anti-scalp wheels are a 1/2" from the ground per manual. What am I overlooking? Does it have anything to do with the hydraulic deck?