BrawlBox Issue?

[NFMLH2]

So I have Project M 3.5 and I used Brawlbox to hack it to what I like. Anyways, I have a mu_menumain file that is 4.73 MB in my SD Card. However when I change 5 things in the MiscData[7] it jumps up to 10.9 MB.. How did that happen? I placed the mu_menumain file into my downloads and it went down to 4.73.. I need help and guidance.. Is this a glitch?
Post Merge: December 27, 2014, 04:13:30 PM
In addition, when the mu_menumain file is at 10.9 MB and I play Project M it freezes as soon as the intro plays.