Ok, I was going by the setting in the posted photo. In the photo the skew setting would be around 45 degrees with the fins vertical.
You are setting it correct if the "0" on the scale is near the 6 o'clock position (the bump on the housing).
11 degrees off axis on a 1.2m.... I will give you medal if you can lock 87W! That would be quite the feat! The fattest signal on 87W C-band is 4000 H 29128.