Is he not just pulling the calyxs off?
Dude I'd just wait unless you see bananas, no real point cutting so much material off the plant to figure out a problem, just look at small samples. If you have seeds you have seeds, it is what it is! it's a pain and annoying but smokable not really marketable though. Only 3 possibilities, 1 it's the calyxs swelling 2 it got pollinated somehow 3 you have a hermie in your garden and it is probs on that plant, check the plant for bananas and go to the sectionon dealing with hermies. I'm doubtful there's a problem but when there is just go through the process of elimination and keep calm then just deal with it and try not to chop into it those bits make good buds.
Good luck!