Skill assignment bug - ice strike

I equipped an ice strike skill gem and assigned it to my skill bar. When I next looked, this skill had become quarterstaff strike. When I try to re-assign it back to ice strike, ice strike is not listed as an available skill and I have quarterstaff strike listed twice with different stats.

Restarting the game does not fix, nor does removing the gem and resocketing. Both of the quarterstaff strike skills perform quarterstaff strike.

I am totally unable to actually use the ice strike skill.

Edit - I cut a 2nd icestrike skill gem and socketed that one. This one works, the other does not!

Edit 2 - I have now lost the skill Glacial Cascade and have two quarterstaff strikes again! Even though this skill gem is still socketed. At this point I give up for now...

Edit 3 - I have two quarterstaff strike skills because I just equipped a 2nd quarterstaff. I wonder if this triggered the bug? I have removed the 2nd staff but I am still unable to assign or see or use the skill (now Glacial Cascade).

So, this problem got me very confused!

I tried a lot of things yesterday to resolve this with no luck, including restarting the game a few times.

This morning when I played, almost all of my skills had a red ! on them. I immediately saw that I needed 5 more int to run them all.

Problem is, yesterday the !'s didn't show at all so I had no idea there was a problem.

So, possibly, the bug here is sometimes you don't have the stat requirements for all of your skills and the game doesn't notify you?