I have the exact same problem... when I decide to have a day "off" then I don't get back on tract next day, or the next... or the next... We (that have this issue!) have to say NO to cheat day. But it is hard when the damn scale don't move...
Last week I did some "You Tube" shopping... lol... and I "realized" what "insulin resistance" is, for a long time I heard that word without paying attention and assumingpigu it was "for me"!!! But now I see why only one day "off" will kick me out so much weight wise, I watched a video on a lady "Dr Boz" where she explain what insulin is really doing and insulin resistance, and following my new "learning", I broke my long time plateau and started loosing again. I know if I lose I will not be tempted to take a "day off" that would turn in a month long!!!