Didn't find anything in the Known Bugs list that matched this, first time attempting to report a Bug, so hopefully I'm doing this right. Waited until Level 16 to socket both Enhanced Grave Robber and Enhanced Incandescent simultaneously, no Masterwork Border was given to Mini-Tool as a result. Dunno if it's a Mini-tool specific issue or if socketing Enhanced Perks simultaneously causes this on other weapons as well. Hoping it to just be some odd error that can be resolved behind the scenes and the fix isn't just "Swap an enhanced perk off and then back on" since that wastes an Ascendant Alloy.