Today I have finally guru’ed my last level 60 kanji: 湧, however here on the forums my level badge is still at 59. What do I have to do for it to switch to 60?
Have you tried logging out of the forums and logging back in?
That was it! I would never have thought, as I didn’t have to do anything in order to have my level here update when I leveled up from level 1 to level 60.
I’m officially at level 60 now.
Congratulations! 
Thank you!