I can't add items to my item sets.

So, this is happening again...

I want to just repair the client, since this is what worked last time.... But the warning I got this time around said that it would erase all of my saved item sets if I were to run the client repair.

Do you think that with the preseason update coming soon that this bug will be fixed? I don't know if it's just my client or if several people are having the same issue.

Thanks