Your edited nutrition goals will remain in your account as long as you don't make changes to your weight goal page or your fitness goal page. Making any changes to either of those pages will reset your Nutrition Tracker settings. I know you said you didn't change those goals, but that would be the only thing that would cause those to reset.
I have set goals for my protein, carbs, & fat, but every day or two they reset to the defaults or something, definitely not the settings I created. I haven't changed my goal weight or my fitness goals or anything like that. Any idea why this keeps happening? It is rather frustrating.