Weight loss is achieved during the short weight loss phase through meal volume control. The two operative words here are short and volume. So if you want to maximize your weight loss during this phase, you need to adhere to the program guidelines. I slid into the maintenance phase at 7 months. After surgery, I was restricted to 3 meals per day. But you are consuming 6. So that might be the root cause.
As far as hungry all the time - after my RNY gastric bypass surgery, I completely lost my hunger. It was not difficult to lose weight when hunger is not constantly continually gnawing at my bones. But after about a year the hunger returned. Not like before surgery, because it was less intense. There are two different phases to weight loss surgery, these are the weight loss phase and the maintenance phase. I slid into the maintenance phase at around 7 months post op, but this can vary by individual. The approach in maintenance phase is very different than in the weight loss phase. Refer to http://www.breadandbutterscience.com/Surgery2.pdf