Looking good mate.
As one off my problems with making kits were the font numbers, because i couldn't find them anywhere. tbh to me it doesn't particularly matter as long if its the right colour and looks slightly close to the real life one's then your good .
And i know how to fix your second one. You can move the files down so for example if you upload the back kits with the number 22 first you can move it down to the bottom with the 'move down' button found on the last button on the right.
Hope this helps
Thanks Scotty, I will give it a crack and let you guys now