been on Copaxone 2.5 years, but still bruising a lot and now have extensive lipoatrophy. Not a pretty sight

Copaxone nurse visited recently and was shocked at my legs.
She said I needed to increase needle depth.
I put it up to 7 for my leg, but I hit muscle, got a severe cramp that lasted half an hour, hopping around groaning.
6 seems to work on less fleshy areas, 7 I can get away with on stomach and upper thighs.
Is this the depth others are using?
Has the depth anythingn to do with lipoatrophy?
Thanks
WW