Scotty, the 3 were rejected as far as I can see because they’re not cropped with either a 3:2 or 4:3 aspect ratio that JP require. The other 2 that were accepted are only a few pixels outside 3:2 so I guess they were a bit lenient on those. If you’re using photoshop to edit, select the crop tool and simply put a 3 in Width and 2 in Height to get 3:2 or a 4 in Width and a 3 in Height for 4:3. Personally I always think 3:2 looks far more balanced for aviation photography but JP will accept both. A slightly tighter crop on the UA would certainly work better though, as Matt suggests.

Hope that helps!

Paul