anytime I try to move something in the last axes, it’ll slowly distort any model with weird angles
to
the bottom photo is the result of attempting to move a model 3 times at a 18 stud increment
This is because btools moves all selected parts in by their faces and if you have different orientated parts, it may bug out like yours for example. To fix this, group all your parts with f3x using Shift+G. Then, move the model.