Recently, I watched a youtube video showing how hand shmurah matzot are baked. I think it was from the pupah tzelem factory.
The narrator showed an explained that after the matzot exit the oven and are stacked, each is individually inspected for folded over pieces and chametz "bubbles" (I'm not sure I followed what this meant; perhaps someone can explain).
Some questions I have about this:
I understood that folded over matzot and bubbles rended the matzah chametz? That correct? Why? What's the concern?
Do they dispose of the entire matzah or just the bad part and keep the rest for shevarim (broken matzah pieces - I was surprised how popular these are. Costs almost as much as the shleimim - whole ones! Why???)
If the disposable part is chametz, how can they now keep the "chametz" next to the non-chametz matzot?
If it's chametz, do they include this as part of their chametz selling?
Do they resell these "chametz" pieces to the public after Pesach?