Thanks again for the feedback. I have a feeling that I'll be taking the insert off again and trying another type of fabric to cover the seams. When I wash the tights again yesterday (with other bike clothes AND rinsed/soaked in vinegar, the problem was back. Sooooooo unless I have to wash these by hand, then machine by themselves and soak in vinegar every time (NOT necessarily convenient to do) I think I'll experiment with a cotton blend material like the tightie whities are made out of, at least it will be breathable and perhaps won't cause whatever irritation must be causing the problem in the first place. It's JUST these tights and none of my biking shorts.
The thing again about the situation with the person who said the nasty things is that I don't know that I've even MET the person. I don't know that they've been close enough to me to have smelled anything real OR imagined. I don't notice anything except these tights myself. The strangest thing about the person who said these things is I have no idea what I might have done to anyone for them to think they needed to say them. I hope I don't find out that I know the person. I'm just hypersensitive right now and somewhat walking on eggshells. I've always had lower self esteem and had to deal with this sort of things in Elementary and beyond, but this is making me angry for the fact that it was said and that I'm not able to shrug it off. Oh well, they've been quiet again for a while so, maybe they gave up again.