I was tasked with creating custom symbols for my company and I' having some odd issues. After importing the toolboxes, some of the symbols are "missing" in the sense that they don't show up in the toolbox. If I hover over the location where it should be, all the pop-up info still shows. I can select the symbol and place it on the document but it's locked and can't be unlocked, moved, or deleted. The symbols that show up correctly work the way they're supposed to. If I delete the toolbox from "Manage Tool Sets" and the .btx file in the directory where they're stored and then reimport it, different symbols may or may not show/disappear. I've tried going back to the template and recreating the toolboxes which hasn't helped and our IT department re-formatted my laptop and that didn't help. Does anyone have any insight as to what might be causing this?