Your fit numbers look very dubious to me. 771 mm saddle height is almost certainly too high for your inseam. Frame stack is ridiculously high at 629 mm for a small or medium road bike. Likewise reach is extremely short at 329 mm. Nobody makes road bikes with those frame stack/reach dimensions (as you have seen for yourself). So I think you need a second opinion on your fit!
Edit: If your fit really does turn out to be accurate for your size/proportions then you are into custom frame geometry to get a decent fit. Putting a 50 mm stem on a standard road bike with a huge stack of spacers is not going to do the handling any favours at all.
Last edited by PeteHski; 12-26-21 at 06:09 PM.