here we go again..saddle fit help

So I sent the last saddle that didn’t fit my pony back (semi quarter bars too narrow). Now here I am with a different saddle. Lower end no brand saddle but it’s for my young kids (2, 4, 6) all which fit it. It seems made better than the fancy looking Double T saddle that I had before and it’s not stiff. It’s also used so that does make a difference.

Without pad it seems almost too wide sitting pretty low on pony…with pad it looks okay (I think?).

Dirty Pony and saddle

Saddle front up close
http://i13.photobucket.com/albums/a256/morgansnmind/20130315_144045_zpse970eaa4.jpg

The problem seems to be the back of the saddle. I don’t have it cinched down because it needs a off billet (?) but it pops up a bit.
So does that mean it’s too small ? (sigh)

Rear view

It fits the same way on my 15hand horse. Fits in the front but pops up a bit more than it does for the pony in the back.