Sometimes they lose the shading, sometimes not, depends on length of coat too. The smooth coats usually lose most of it.
7.5kg (16.5 lbs) is a Standard. Mini's are considered anything under 5 kg (11 lbs), though here, the smaller standards (which yours is, as the AKC says they're usually between 16 and 32 lbs or 7.25 kg and 14.5 kg) are usually called tweenies
Well technically, anything over 11 lbs is a standard, but backyard breeders want to put a special name on things to be able to sell them for more money, hence tweenie, teacup, etc. those aren't real, just something byb's dreamed up.
No at 9 months old, your pup will not grow more, unless she gets fat LOL