issue with gf670 film advance knob

[paapoopa]

recently i have been having issue with the advance knob that it will not allow me to advance the film all the way after i finishes 12 shots on a 6x6. when i try to advance after my 12th shot, it will stop at the 13th, and i take a shot at 13th and advance, it will stop at 14th and so on.

was wondering anyone encounter the same issue as i have.

 

[thegman]

You sure it's not set for shooting 220 film?

 

[paapoopa]

although i am pretty sure i am not on 220, i will watch out for it on my next roll,
its been happening for the past 2 rolls already