Pivot shaft problems

Ok so this has happened 2x now. I install the bushing on the shaft, install LCA and slightly tighten on the nut then boom the nut won't unthread or loosen. This only happens on the drivers side.

With 2 different shafts and 2 different nuts; the nut has gotten stuck (maybe cross threaded?) And won't come off. When I try backing it off the shaft/bushing spin in the lca and start taking the bushing out of the lca. I dont use power tools on the car, everything is done by hand tools as I like having a feel for how tight things are getting.

Have I done something wrong? Will it be different if I have the torsion bar in?

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This is what I have been telling all of you about the poly bushings being junk. Look at the picture and swallow your words. " no They can't move back the struts hold them in" LMFAO Lube it up a little more with a pin with a grease fitting. It may walk front and back a little easier and not squeak.