Hey, first please know the facts then accuse someone else friend.
The posted image and the marking are absolutely correct. Why ...
Think your dish antenna as a mirror and it acts as a mirror too to the facing satellites. What does that mean?
1. If Sat-A is left of Sat-B, then Sat-A LNB should be right of Sat-B LNB & vice-versa
2. If Sat-A is at higher elevation than Sat-B, then Sat-A LNB should be placed at lower elevation than Sat-B LNB
For more info, I'll suggest you to read this article.
Link:
Satellite dish pointing using a multi-LNB dish