So for the last 3 day's I've search this form & spent countless hours trying to get the setting correct for this combination of len & Camera Canon 7D with 17-55mm 2.8 EF-S

reading the form & with my own testing the lower arm is set between 56-58mm
upper arm is where I'm having the issues. no matter where I set it I always get the same results

upper arm set at 60mm

upper arm set at 90mm

upper arm set at 120mm

panoramic software I used was Hugin

is there any other adjustment I can try?