In even mode, the polygon and polygonal pyramid are a block longer in one direction than the other resulting in a 2x3, 4x5, etc shape instead of a 2x2, 4x4, etc shape. This also (probably) causes the shapes to be off-center from the origin, in some orientations more than others (see pyramid in screenshot).

*suggestion: it might be useful to add a length/width adjustment for both shapes

Here I'll leave a couple examples:

Thanks for your work on this mod, I love mods like this that are lightweight, practical and extremely useful 👍

Fixed in commit 1a60389 and just released!

Thanks for letting me know! Looks like I forgot to properly test them. I'll fix them before the next release which should be relatively soon (for my doing at least lol).