I found a bug in 6 column bags mod posted by lollygagger.
Change to Square mod from other mod(Vertical or Horizontal) ingame, setted 4 column not 6 column.
Exit EQII and reconnect, it works 6 column correctly.
But change to other mod and return to Square mod, it works 4 column again.
Because it modded initial array mathod only not ingame-rearray mathod.
I mod ingame-rearray mathod to 6 column, it will works 6 column correctly with anyway.
