Actually, I'm now having a problem with Battle Arena. :/ It says that I'm gaining 42 million generals on every hit. Although when I check my profile my generals haven't budged from "2,147,483,647." Now normally I wouldn't assume that there is a cap that K1ng just didn't tell us about though when I took a closer look at my stats I found that they are all "2,147,483,647." Now this shouldn't be, my strength should be much higher than the rest of my generals considering that's all I have been training outside of battle arena.
So after seeing this I figured I must have reached the cap and need to rank up to Genin. So~ I did. And after waiting the thirty minutes to use Battle Arena again at the Genin level I've found that I still am not receiving the stats that Battle Arena claims I am.