The words of reading in the "Progress Snapshot"

On my first assignment, I increased the number of reading to more than I actually read.
I noticed the mistake and corrected it.
However, the words of reading in the “Progress Snapshot” still shows the number much more than I actually read.
How can I fix it?

You can click on the ‘+’ sign next to ‘Words of Reading’ in the Progress Snapshot box and then you will be able to subtract any number of words that you want. Please see my screenshot: http://screencast.com/t/RsMC2HEr1.

First, click on the ‘+’ sign next to ‘Words of Reading’ in the Progress Snapshot box. Next, follow the instructions in my screenshot in order to subtract the number of words you want to subtract: http://screencast.com/t/RsMC2HEr1.

Thank you. I got it.