Well, I gave ya plenty of reading material.
The side thing should have been covered in at least one of 'em.
I'm positive Pendragon made such a comment in his circular/linear LNBF thread.
I think you'll have an "ah-ha" moment pretty soon, and this'll all be clear. -
As for the switching, there's not really enough info to say what would be best.
I recommend the Switches Simplified FAQ (naturally) and maybe
post #6 with eight LNBs as something to try.
Lastly, regarding the swapped polarity of your add-on LNBF, it looks like it's rotated 90° in the pictures, so... V & H should be swapped.