Everything (seams, saddle, etc) seam to be located ok.
I was just wondering if the sores lined up perfectly along a seam line, etc?

I've rodeo'd my whole life so saddle sores aren't anything new to me, but typically I just got them on my sit bones, not everywhere else!
This is also odd to me...I have never rodeo'd, but spent about 20 years riding, including very long hard days over all kinds of mountains, and never had a saddle sore.

Maybe you're a hothouse flower! (I know, I know, sores are no laughing matter!)