So it took 30 minutes of re-installing My Fitness Pal, adding in the day's calories in/out and comparing to exactly one year ago to figure out the culprit(s).
1) Snacks throughout the workday.
I ate (I can't believe I'm revealing this to the world) 1000 calories between 10:00am-4:30 pm. The snacks I was bringing, to avoid mid-day hungry/hangry just kept creeping up.
June 16, 2014: Breakfast, Salad lunch with a peach, pineapple at 3pm
June 16, 2015: Breakfast, 10am: 2 lite string cheese sticks, 12:30 pm: Salad lunch + full-fat yogurt with berries + pineapple. 2-4:30pm: pistachios and rice crackers, celery/bell pepper mix, grapes
Today I brought my lunch and a container of blueberries and the celery/bell pepper mix. I only ate the wrap I made for lunch and the blueberries so far, and I'm leaving in 5 minutes. I'm hungry now, but walking outside will cure that (its too hot to be hungry).
I am trying (and liking) OMDG's trick of waiting as long as possible to have lunch. That leaves no time/appetite for snacking. It was easy today, a clinic day. I had no time for mid-morning snacks. I didn't have lunch until 2pm. Will be harder tomorrow when I'm in my office all day AND I work out in the AM
2) Decreased exercise?
June 2014, I was routinely logging 15-20K steps/day at least 5 days/week (some of those were from running, which is the only exercise I did back then, 2 short runs + 1 long run/week). I don't know how many I'm getting these days because I haven't been tracking, but I suspect its less. Some of this may be artificial, because the calorie burn MFP gives me for my workout classes seems WAY too low, considering I'm working much harder than I would during a 30 minute run. But I'll use the calorie burn they give me, because that actually would workout in my favor.
I realize that if/when I lose the weight I want to lose, I need to reset MFP and figure out the right amount of food for maintenance, instead of just increasing willy nilly (and increasing and increasing and increasing...). I probably need to repeat this exercise every 3 months of so, to make sure I'm staying on track, its so easy to veer off unintentionally.