is it getting harder with time?

I just had my 25th and I'm feeling great about the whole MFP thing . Just noticed lately that as time goes by I have a harder time staying in my range. I usually work out to earn some more calories, but especially this week, I've had days I had to get in a bit of exercise before bedtime, just to stay in my range. I doN't mind exercising, but I kinda don't want to eat all the cals back. Yet, I feel hungry and not satisfied with the stuff I eat (at least not for long..)

Is anyone in the same situation? Maybe you wanna take a look at my diary. I've upped my protein a bit and maybe am not getting enough fillers in...