You should have it re-aligned after you replace the bushings. The bushings position the lower control arms through the strut rods which pushes or pulls the lower ball joint which affects the camber/caster. It would seem reasonable that worn bushings would have the lower control arm/ball joint in a somewhat different position than new ones. Besides the fact that aftermarket bushings may be a bit different dimensionally than the originals were.

And then you have the fact that you have to totally unload the torsion bars in order to remover them and slide the lower control arms back. Once it is all back together, the ride height will probably be just a bit different which also affects the alignment.

I would certainly be having a conversation with whoever told you all the bushings had been replaced.