Endoscopy today for revision...not sure what it means...

So, I had the RNY 6/05 and gained about 80 lbs back from the 140 lost...I kept telling my doctor I know I am eating too much so he said he doubted it was structural but the endoscopy could give me some answers...
So I had it this morning and the GI said that the pouch is fine, but where the food leaves the stomach, the "exit" is wiiiiiide open so I don't feel full bc basically everything is going right through...I'm not sure how one would fix this? anyone ever hear of this? or know how it happens?