P.S. don't chase the full feeling - for one thing, most people don't feel restriction to around the time they start up on solid foods - or until the nerves that were cut during the surgery regenerate (which also tends to be around the time we move to solid foods). Plus the "full" cue is often different after surgery. I don't feel full the way I did pre-surgery. Now, it's more like a discomfort in my chest. when I feel that, I know it's time to stop, or I"m going to be sorry. Others have reported weirder things like runny noses when they're full. For now, you're better off measuring out what you're supposed to eat and just eating that.
and no - your surgery is not unsuccessful. You're losing weight at a normal clip. And you'll continue to as long as you stick to your program.