Hi lumi

. I admire your efforts to lose weight but also really impressed by your ability to be open-minded to suggestions and changing. Such a great attitude.
To me the answer is probably a mixture of bad high sodium and fatty foods, added muscle tone accounting for a bit, and natural fluctuations being at work. I always fluctuate up by two pounds from a loss. I've never not done that and I've lost fairly steadily (except the last few weeks..grrrr).
I do agree its pointless to eat the foods you do and expect to be able to lose more than just at the beginning when just cutting back on portion sizes alone works. That stops working fairly quickly though and then you need to work on optimizing your body's metabolism.
Eating healthy foods that are harder to digest and getting lots of exercise will do this. Try to plan better as that is truly the key to not eating fast food (not to say I never do but I find whenever I haven't planned I eat badly and more calories than intended).