Unfortunately, I found another plant this morning putting off male bananas on all it's branches. Been picking them off all morning. So, out of 8 plants, 2 have shown male tendencies so far.
Sorry to hear this.
FWIW, I've grown this several times each from ceed and clone, and never NOT seen bananas, but in most cases they were relatively limited to only a few clusters on a few individual buds and typically only started appearing around week 5-6. I never saw any seeding, even when I deliberately left them in place.
Don't know if it was the 'cause' but the single plant that showed the most bananas for me was also stressed by overwatering, which I had to do to preserve the plant over a prolonged absence. The only plant I had that showed true nodal male flowers (as opposed to "bananas") only made a few, then completely stopped. This was the plant I deliberately stressed with prolonged darkness. Haven't seen a "true" male yet, but I've only grown a relatively limited number of beans, relying more on clones.
In your case, bananas starting at week three is problematic and likely a bad pheno. Please keep us posted. If that particular plant doesn't improve shortly with your work, I'd strongly consider culling it.
As food for thought, another way to look at it is that out of 10 of your plants, 4 so far have shown significant male tendencies.
Given the skewed gender ratio (8/10 female for you, and 3/3 for me), I actually wonder if some of these intersex plants are actually genetic males that are phenotypically female (or maybe genetic female pheno dominant hermies). That may sound a little "crazy", but sexual expression in cannabis plants normally isn't strictly male/female like in people or most animals. Simple repeated culling of "pure" male plants for indoor growing after many generations would be expected to reduce the frequency of that sexual phenotype, with increases in others. The fact that Sickmeds had to bring this line back from a small number of viable beans can't have helped here, either.