You 100% were not in show real mode to begin with.Thanks but i think it was kind of a bug.
I was 96 and bought 4 +1 SS to GM it.
I took three of them without waiting between each and i gain +1, +0.9 and +0.8 then reach 98.7.
After waiting severals minutes, i try the fourth one and then gain +1. I'm in "show real" skills mod.
Thanks for answer.