He was saying that the most common mistake made by people using a WS is that they don't do them up properly, that the front cinch is done up firmly and the back cinch is left loose. Or worse still the back cinch is left off all together. He referred me to his website as there is a video showing the correct way to put on a western saddle, with both girths done up with equal pressure.
I am guilty of leaving the back cinch quite loose so after watching the clip I decided to give it a try. The next time I saddled Phoenix I did up both girths with equal pressure. I actually was amazed at the difference I felt, I felt a lot more balanced and felt my horses movement in a totally different way. I will definitely continue to put my horses saddle on in this way. I also wonder why I didn't know this, is it widely known that this is the correct way to do it? I see a lot of photos on this site of horses with no back cinch on their western saddles at all.
I have attempted to put the link to the video clip on this post, I've never tried this before, hope it works.