Been there. Done that. Got the T-Shirt - but don't wear it.
One more reason to use the Triangle Marking System. It's
even more critical when the parts are solid wood rather than
ply since you want "the inside of the drawer to be on the out
side of the tree" (IDIOT) per Frank Klausz. Can save a lot
of grief if all parts are marked to identify what goes with
what and how it's to be oriented.
Furniture making presents so many opportunities for
screwing up. It's amazing that, with all the parts, joints
assembly, glue up, fitting and finishing, that the end
results turn out as well as they do - sometimes. Without
a methodical approach to things going to hell in a hand
basket is just waiting to bite you in the ass.
But when everything comes together just right ...