Changing word and page count on Windows 10

Hi, I have googled this question but didn't find a clear answer

Does it really matter if word/page counts change in a large word document?

I have been using editor on a document a couple of hundred pages long.

The word count has been giving me an idea of how much I have removed from the document as I work.

I didnt close down the document, and this morning when I came back to it, instead of roughly 102800 words and 210 pages, it showed around 104000 words and 212 pages which is where I started at.

I saved a copy, shut down and reopened the document and it still showed the same counts.

I scanned the document for changes I had made and they appear to be all there, however now editor is indicating more changes required to areas it previously didnt (editor corrections and refinements are completely different)

Is this indicating just a delayed updating problem with the document, because I didn't shut it down for an extended period, or is it something more serious?