Nice to know that non clinically qualified test personnel are happy to give annopinion about what would or would not cause a false positive.
I'm always happy to give an opinion and at no charge too. You're welcome!
But my opinion is based on:
1: logic. The purpose is to find people who abuse pharmaceuticals, they're not really interested in who eats seeded bread. So it's surely in their interests to make the tests do that better.
2: ethics, i.e what should not cause a false positive. It's not right that someone who's never taken illegal drugs should go through this crap just for eating a normal every day food product.