Do you have a curb strap on your bit? I really don't like those cheap aluminum bits. I don't hink it has anything to do with your problem it's just something I noticed. Your horse looks much nicer than the other two in the photo. Please don't ask those two people for horse advice. If you can afford to buy a higher quality saddle then do so. the one you have doesn't look that great but it's not a big deal. As far as saddle fit you can just add another pad. There are also western pads that have a build up in the front to lift your saddle. I am not one that looks to saddle fit for every behavior problem a horse has. Your saddle does fit a little close but don't be suprised if changing that doesn't fix the problem. If all she does is pin her ears I wouldn't worry about it.
There's nothing like the Rockies in the springtime... Nothing like the freedom in the air... And there ain't nothing better than draggin calves to the fire and there's nothing like the smell of burning hair. -Brenn Hill