MFP promptin recalculation?

Mine did the same to me after my 10lb loss. It kept prompting me even after I said yes until I got fed up and went into the settings and reset my goals. To keep going at 2 pound loss, my colorie intake dropped close to 100, so it's not a huge change.

It'll do that at every 10 pounds to recalculate how much you should eat to lose weight. It changes with your body weight. There's an explanation of why it does that out there somewhere in the IIFYM explanations.