Professional Sports Lvl 6 Uniform Glitch

DivinylsFan​  Some uniforms are in fact glitched, and sometimes one gets assigned improperly.  There's really nothing to be done other than changing the uniform or waiting until the sim gets promoted.

As for a list of skills a child can learn, I found the wiki skill page to be reasonably good:

https://sims.fandom.com/wiki/Skill

The only issue I see is that it doesn't point out that some skills are hidden in children.  But you probably know what those are already (e.g. Athletic, Handiness).  If this list doesn't work for you, what about it is an issue?

It is an awkward table and makes me feel similar to after I've seen ants. I prefer a simple list.

If there are hidden skills, such as charisma, what indicators are there for when they've reached levels? 

I went into stylist and changed her uniform, and then after she was promoted and got a new one she was fine.

She is a pre-made sim in Monte Vista. My sim married into her household to her sister. She came with the life time wish of 10 boyfriends. She has her main squeeze in Monte Vista. They went on vacation a couple of times and she has an extra boyfriend in two locations, that's 3. Now she's just been to University. I realised she needed to break up with one before getting another one. So she had a string of those and got up to 10 on her last day there. However, it didn't fulfill the LTW. Is she supposed to go and break up with the one's in the vacation spots and the last one at University, having just her main squeeze remaining in Monte Vista? Or is it not fulfilling because they were in separate worlds? If she goes back to University and goes through another 3 there, making 10 in that location, will that fulfill the LTW?

DivinylsFan​  There's no direct indication other than the skill bar filling up and emptying while they're doing the activity, just like you'd see with a normal skill.  However, MasterController reports hidden skills.  Click the sim and select MC > Status > Skills, or go through City Hall and select MC > Sim > Status > Skills and choose the sim from the list.

You can also change any skill, regular or hidden, with MC and its Cheats add-on.  Click the Sim (or go through City Hall) and select MC > Advanced > Skill Level to get a list of all the skills in the game, then choose the one you want and give the level you want.  The -1 means the sim hasn't even started to build a given skill; you can use this if you want to erase all data from that skill, for example the number of paintings/inventions/etc. a sim has created or the number of fish they've caught.

I've never tried to use this to apply a skill to a sim who's not old enough to have it, so I don't know whether it would work or you'd break the game or at least force an error.  If you do want to try this, save first.