Just fixed the problem myself. Turns out I made the mistake of trying to enhance it with a bonus potential scroll instead of enhancing it with the regular potential scroll first. Now that I say it, it seems pretty obvious.
I used a 100% potential scroll I got from doing the ninja castle questline, you know, the one with the toad emperor boss. Anyway, I tried using it on the earrings, and it said it won't apply or something. If it helps any, I am in a non-reboot server…