Stabilizer jacks are not designed to support the TT.
Though some are rated to several thousand lbs, the intent is to snug them up to reduce bounce, not to support or level the TT.
I was on a bad slant once and had to raise one corner 4 inches to level the TT. I cranked on the stabilizer hard and up went the TT to level. All was good until I tried to open the door. All I had done was flex the frame putting the door jamb out of square.
So, I had to do what I should have done the first time; put enough blocks under the wheels to level that side of the TT. Since my supply of blocks was limited we settled for close enough.
It is almost impossible to remove all the TT bounce unless you put it up on cement blocks and even then you would not support it only at the four corners.
Stabilizer jacks do just that, reduce the frame movement at he ends to add stability to the spring mounted frame.
Trailer bounce is one of the joys of RVing.