This time it's much,much harder

Here are the stats, see for yourself:
I started on the 22nd at 158. Today I'm 153.
That's 5 lbs in 12 days. Only. I'm eating 500 cals a day and exercising for at least an hour. Why??? Before, I used to be able to drop a pound or two a day!
Which is why I need to do more than just keep track of numbers. ALL my intake and exercise is going in this blog.
Today, so far (because I'm going to eat more at brekker to keep my metabolism going) I've eaten a 300-cal bowl of oatmeal and a diet hot chocolate (25 cals).
Goal is to exercise at least 2 hours and keep intake to 400 altogether.
Will report back tonight, to see if I've met it.