STFT Banks 1 & 2 - What is normal ?

Is it normal for STFT Banks 1 and 2 to be off from each other, and by how much is considered normal ?

http://www.datazap.me/u/buraq/beastm...ata=2-13-14-15

The only thing I found when searching was related to an M3 in which its STFT bank 1 was in the negative and bank 2 in the positive is has no relation to my concern.

Thanks in advance.....