You'd learn a lot more if you didn't come into it just looking for everyone to validate your flawed premise (which is what exactly?). It's not like there's dozens of possible explanations. You either have an undiagnosed respiratory issue (which you denied), or, you've overestimated your FTP. What else could it be? You've been provided with a solution (test) which could help narrow it down EVEN FURTHER, but you seem intent to stick to your guns with some OTHER unidentifiable explanation (a second shooter if you will). You're beyond help at this point.