Yes, This was when I lived in Virginia. The area I hunted had lots of rocks, both heads that I bent the tip on was not a bad bend but more like the starting of a curl. Both occurred shooting at squirrels close in (you know, can't miss, yea right), rocks are not very forgiving at 15 feet or so, LOL!
On the spinning/truing, you just have to give it a good go. If you can't get them to true up, send them back to Zwickey, they will replace.
Are the screw in ones you get now built that way or still the same as old one, meaning you have to glue the insert into the head.

Squirrel story: There was a squirrel flattened out against a big tree one day when I was hunting them and stump/clump shooting. I made a good shot and pinned him against the tree hard (field tip through the side), he could spin around the arrow like a "pinwheel", before I could find a stick to knock him out he tore/bit a brand new alum arrow dam near in half, but he still tasted good.

Changeling