Super A hydraulics levers controling throttle

The suggestions Nat, Sam and Mark gave are all possibilities. Bolts out that tie that dash to the top of battery case, plus hydraulic levers not moving freely will make this worse. I've also run across a few of these tractors with the dash badly rusted where it bolts to torque tube. Some of these are rusted so badly by now, the only thing that keeps the dash standing is a combination of being bolted to battery box, all the controls plus the steering shaft.

A new dash isn't that hard to fabricate, take the old one to a fabrication shop with rolling machine and he can shape that up quite quickly.

1. Something is rusted up and causing the whole thing to move, like all the levers are rusted to the common shaft, and the shaft is turning in its mount.
2. Something is badly worn, moving too easily, and causing the whole thing to move, like the throttle and hydraulic levers are all so badly worn and move so easily, that even the slightest friction between them causes them all to move together.
3. Something is broken, causing the whole thing to move, like the common shaft is broken from its mount and rotating when you move any lever.

I think you need to take it apart and figure out what's going on. It certainly doesn't sound like a common problem to me.