Word Count bar

I tried to set a word-count goal for a doc with 1800 words already on it. I set the target for 2000 words. The counter told me I was 3% done. Thinking “hm, my math’s not that great but I’m pretty sure that’s not right”, I reset the counter to 0. The total word count for my document became 30. I then opened another document, returned to the previous one and again it counted 1800 words on it. When I tried to set the target again, it worked correctly. Haven’t been able to reproduce it ever since.

Windows 7