What length stem do you currently have? Also what bars, as the reach can vary wildly. Finally do you ride mostly on the hoods or the drops?
I've tried 90mm - 120mm stems. My knees were banging on the 90mm when I got out of the saddle sometimes. The larger stems are less twitchy and give me a lot more steering confidence.
I ride near
the hoods mostly, about 7cm back on either side of the bar top and I feel fine there. My back isn't stretched out, nor is it overly upright. It just looks and feels good to me.
You are right about the bars, mine are quite long in reach (89mm 3T Ergonosum).
I question why you are so demeaning of the person who fit you.
Well this person's idea of a fit was to simply look at me off
the bike, so it wasn't really a fit. They told me I wasn't even allowed to sit on one of their bikes. Plus I've had a number of mechanical issues due to the mechanics incompetence so I think I'm justified.
You claim a lack of road bike knowledge so how do you know you are on the incorrect frame size?
I've been to a few other bike shops to sort out my mechanical woes and they seem to agree.
I initially took my bike with the lowest stack and had some lower back soreness - because I wasn't used to the position -but its not wrong.
Yes, but I've had my bike for a year now and I've given just about every position full acclimatization period. The one I have now feels good except for the reach.
Post a pic of you on a trainer so we can see what is going on here.
I don't have a trainer but I'll try get some pics up.