*sigh* There is a myth often stated on this forum, that states the racing stripe only appears on older fems. (Not directed at you DarkBlade). While sometimes this may be the case, many have it showing by juvie-early adult stage. This is how Neon Yellows were bred.
As far as the clear line on the shoulders, some speculation currently suggests it is a sign of growing fast.
Saddle area line means your water is not optimal for the shrimp. They're having molting issues and will probably die later down the line. Your water may be too soft or too hard. What's your water params?