Here in New Mexico, I can get this bird very well on most of the stations execpt for TELEUISA TIJUANA Freqs, 12086 GHz 1.954 MBs H.
Sometime, it's hit or miss on TELEUISA TIJUANA station I am wondering this might be a spot beam?
I'm in your area and it comes in fine whenever I try to tune it iwth my 7.5' or 10' dish. What size dish are you using and I'll see if I can get it on my 90cm or 120cm dishes since I assume your dish is probably around that size.
big things I can think of for that signal are alignment of the dish, size of the dish for the spot one is in the footprint, and how well a receiver will do with that low of SR - some of my receivers/tuners are fine to 1500, others are deaf below the spec'ced 2000 SR low limit.