Unfill questions

I had an unfill (from 2.6 to 1.8) about 1 week ago. Prior to that I was at 2.3 and got that second fill becuz I wasn't losing and could eat a lot. I'm noticing I have pretty good restriction at 1.8 so what gives? Could it be still some swelling. I'm sure I'll need to get some more fill soon but this is strange to me. I don't think I will ever understand the band as one day at dinner out I ate bread, steak (thin, tender) and french fries and the next day I could barely eat 1 tiny piece of quesedilla (sp?). Yesterday I took an hour to micro chew a vegetarian brautwurst that ended up coming up and was on soup and protein shake last night and today. I just don't understand restriction/fill - I think this is the main reason lapband is sometimes thought to be less successful then gastric - fills don't make sense and are hard to get right!