As someone who wore bras for around 15-17 years, I can tell you, it SHOULDN'T be normal. But I can tell you, the bras that fit me best always left grooves. Why? Because while my torso is long as no one's business, (especially for someone only 5'2") my upper torso is TIIIIIIINY. So yes... many bras have the adjustable straps, but they are really designed to be comfortable for an average body type. The problem is... 'Average' really is only a finite number of people. So I dealt with the aggravation of uncomfortable bra straps either falling off my shoulders, or digging into them... There never was a good bra for me. Even now, my binders fit me awkwardly for similar reasons.