My chiropractor came out to see my horse and took a look at my saddle. She felt it was too long for her back. I had a saddle fitter out in September. He never mentioned about the saddle being the wrong length for my horse. He was actually the one who chose the saddle for her.
A lovely woman I know offered me the use of her Schleese saddle until September if it works for my horse. I really expected it to not fit, but, at the very least, I wasn't horrified by what I saw. It was made for a short backed horse, which is handy for me. The unfortunate thing is the saddle will either have to work as is or with correctional pads as I cannot alter a saddle I do not own. Before I arrange for a saddle fitter to come out, I need to have a general idea about the fit of this saddle on my horse. It would be a waste of my money to have her come out to look at a saddle she cannot alter and that cannot be corrected with correctional pads.
Does it look like the correct length for her back? I was surprised when I measured it to find it is about two inches shorter on her back than my current saddle. Does it look like it is a reasonable fit as is? Or that things could be corrected with the right correctional pad?
With the understanding that photos are never as good as hands-on:
Your saddle, though not girthed down, looks too narrow for your horse. (The pommel is almost even with the cantle, and the deepest part of the seat is towards the rear instead of the center.) That alone, because your weight would be shifted back towards the cantle, could cause your horse's back to be sore. And if your horse has gained a lot of weight since your saddle was fitted, it's possible it fit correctly when the fitter worked with you, but does not fit now with the change in your horse's shape over the shoulders/withers.
That said, the saddle in the second series of pics does seem to be a good fit. Riding in it for a while will tell the tale.
CP your saddle may have fit when the saddle fitter came but it does not fit now. as melissa said, too narrow. Also you have both saddle placed too far forward on the shoulder. Saddle should sit two to three fingers behind scapula. The Schleese looks like a much better fit, but again, move it back a fair bit.
The one thing about the Schleese is it is cut back for the shoulder so I wasn't as concerned about pulling it back. I was concerned about both saddles being too long for her, though. That was where the saddle seemed to "sit", but I could try again. I was pleasantly surprised how nice the Schleese looked. It would be wonderful to have a saddle to use for free!