Dish alignment help

I've tried and failed to properly align my dish after the recent storms. I'm getting maybe 90% of Sky channels but not all the HD ones.

I have a First Strike FS1 which I've used successfully before. It doesn't work with DVB-S2/mpeg-4 TPs so I have to use DVB-S ones such as TP26 from lyngsat.

I get high signal strength and quality readings and similarly with S/N.

So I'm wondering why I'm missing those HD channels and how I can get them. I aligned the dish before Xmas after the...

Dish alignment help