dmp if you pay the guy doing the sizing he will figure it out even how to fit u in a 5y y/o trike and that doesnt mean that you are in the right sizing... i have notice tall guys riding small bikes and small guys riding big frames, the curious thing is that they say they feel ok Other factor are styles and the MODE? Back in the day because lemond said that as back the saddle the better and still a lot of old freds are riding with that style only just because that worked for lemond. A few years ago came the mode of using super small frames and long ars seatposts. Other guys use the stand over height that really didnt work before and does not work today as a rule for right frame sizing, but some guys are still using it and still cant figure it out that different bikes have diferent BB heights and TT heights so the rule of thumb of using stand over gets out of any question right away.

Even CC sizing web program u end up with sizes a little bit off for some reason.

Sadly frame sizing is so subjective that is really hard to know or tell you that you are wrong or right w/o seeing you.

Whats the model of the bike and do you have a picture of yourself riding it?