I hate to say it but not every 6'2" rider needs the same size frame. There is a lot more to bike size fit than measuring your height- inside leg and that is your frame size. And a particular size frame is not for one size of rider only.

I am nowhere near your height but I ride Giant bikes (And others- but stick to Giants for now) I ride an XS-an S and an M. How can someone that rides a medium frame that fits him- Also get an extra small frame to do the same? In frame sizes this equates to a 49cm to a 56cm frame. That is one big difference. I know Compact frames are supposedly able to fit a wider range of rider height etc- but normal frames can do the same.

And I am not sticking up for the shop here- but realise that Differing body dimensions could make an unusual size of frame being necessary to fit certain people. I am one of the lucky ones in that I can make a wide range of frames fit me. And they do fit.

And a 5" rise on a saddle is not unusual.