The maximum personal experience an MP4 can have is 4 Million, but when I am training at the GGG, it says "Maximum XP reached in this level" even though I only have 2 Million personal xp, is it a bug?

Did you have very large negative honor? It does the same thing as being at max xp.

My Honor is -526 even though I have a perfectly balanced fights.

I tried continuing the story mode and after that, I attacked someone at GGG and the max xp message is no more, but when I attacked the second time, it came back again. Does this have anything to do with unfinished story mode? I mean, the max xp is 4200000, but now I have 2100000, which is half of the max xp an MP4 could have...

When you have -500 honor, you cannot gain more exp, before you gain more honor than that amount. It's as if you are indecent as a leader to your creatures and they don't want to learn any more before you raise your image in their eyes.(although this isn't the real explanation, it's a way to understand it)

P.S. Creatures aren't real, i know. They are in your mind, nonetheless they gain experience.

Edited November 26, 200916 yr by Elthen Airis

Heh, well thanks for the help, I didn't know it so I thought it was a bug. Thanks