A family of Microsoft word processing software products for creating web, email, and print documents.
> Why are there two? Which one is correct?
The number in the dialog box is the correct value.
These numbers are generated by two different processes. The dialog box immediately calls its process to do the counting when you open it. The process used by the status bar is run in the background. When you have a huge document such as yours (380 pages), it takes longer for the background process to finish.
> This is true of all documents.
Are you sure? Create a 1-page document with some text, and see if the two counts are in agreement. I suspect they will be equal because the background process finishes very quickly.