Replying to Weird Binding setting

Went to the local ski shop to get my bindings adjusted for three skis (I don't my self enough to do this). They kept my skis for two weeks and charged me $100 which which seemed like quite a bit, but anyway the thing is that my bindings are set pretty weird. I'm 135lbs, 6' and a pretty avid skier. The settings are as follows:
Salomon STH 13 on Faction 2.0:
Right ski:
toe(Right) din 9
heel(Right) din 6
Toe(Left) din 9
Heel(Left) din 5

Griffons on a sickday 110 (mud on the skis when I got them back):
din 7 front and back on both skis

Nordica Firearrow 80 TI:
7 front and back on both skis

the adjustments on my factions left me quite puzzled

did they forget to do it or is there something i don't know. They said that they would wax the Factions as well, but there are no signs of that. The only thing that has changed with them is a 10cm long scratch in the base... I really don't want them to do anything else to my skis. Should I adjust the bindings myself (to din 7)?