I'm not sure which post you're referring to with the "that's why I said" thing.
Consider something if you would. Let's say I was in a contradictory mood, or any sort of bad mood, and did throw a very subtle "disagreement" out there. That could happen due to something as simple as feeling a bit hungry or tired, or being uncomfortable from a pain. It's not fair to you if you make that your karma, and carry it as a burden. There is some value in fearing that you're missing out on subtext, but on the other hand it's easy to come off strangely if we need clarification on something we perceive as subtext, but the other person doesn't (even if there actually was subtext, they may not realize it).
For people with a very active mind and mild paranoia, that comes up more often. I know it's not as simple for you as most others to just "let it go," but at least recognizing in those moments that it's a small thing and that the perception of negative subtext directed at you is at most temporary, and possibly doesn't even align with the perception or intention of the other person.