My dealer already set the draw length to its shortest possible - 25.5"
Hmm... a red flag in that.
I got my first bow at Cabela's. They set me up with a nice bow and I could shoot it fine, or so I thought. I have long arms, so the dealer set it to the longest possible setting - "31"
However, no matter how much I practiced, I could not get reliable groups. I found out why. Despite my alias on Hunt WA, I'm not little. That's what they called me when I was a kid. These days I can just about reach the ceiling when sitting on the sofa. To shoot right, my draw length needs to be about 34 inches. I decided to have custom compound bows built, one a Martin the other a Hoyt to that size and right away I jumped up from a reliable last place to about forth or fifth in league shooting right behind the guys with swell tournament bows. Then as seems to be the norm for new archers, I ruined a few arrows doubling up on the same target until I came to my senses about how much an arrow costs. So for me, the grouping problem was all about draw length.
Buyer beware: dealer don't care!
To them, a bow that fits right is a lower priority than moving inventory. Bows are kind of like shoes that way. The bow needs to fit you right. A lot of people will just buy the standard shoe even if their foot is a funny shape... then all day long, "unh... my back hurts," etc.
Consider treating yourself a trip to a pro-shop. You might need a custom bow that is smaller than standard size. Fortunately for you, you may not need a custom bow case. Now I sure liked that first bow, a Parker, but I faced the facts... I couldn't use it how I wanted to. So I sold it to someone that could use it. Oddly enough that first year I won a PSE bow in a drawing... couldn't use that bow either. It didn't have a setting for ape length, so I brought the prize bow to Texas, buddy of mine down there wanted it.