“My invisalign prosess”

hi im having invisalign at the moment and i wanted to know about the pricing in Ausralia my problem was mild overcrowding of my lower teeth and a 1mm gap inbetween my front upper teeth the orth quoted me $7000 for a year and half treatment.

when i got the plan back wnd my first set of aligners she told me i only needed 5 upper and 9 lower to fix the problem.

does the price change for that seeing i dont need as many aligners??also i was wondering why ive started to get black little triangles of space appearing on my lower teeth ive had my aligners for 4 weeks now??please help!!!

wanting to know if i should be paying the original price iwaw quoted? why am i starting to get small black triangle spaces in my overcrowded teeth??