What could have went wrong with my eyelid procedure? (Photo)

I had blepharoplasty to remove excess skin from my upper eyelid about 17 years ago (when I was 3/4 years old). My eyelids look fine when relaxed; they’re even and everything. However, when I show any positive emotion (when I smile, get excited about something), my repaired eye bulges open while the other stays normal. I can open the repaired eye to an extreme extent than I can the other one upon demand. When I smile, the repaired eyelid perfectly curves around my iris, while the other does not.