I used exactly 180° and 90°, but Iäm not sure if that’s correct (I expect it, but…) I don’t know what is causing that rotation in the first place…
Let’s try this: ALT+R and then Voxelize:

Maybe you should also look at the Scale? (Try removing the minus signs, or just use ALT+S, whatever gives the best result…if it makes a difference at all)