I also wish there was a better way to keep track of editing. Editing is where most of my effort is spent. Writing a shitty first draft is often very easy. Five to ten rewrites of that draft is hard and very time consuming. Thus, the idea of counting new words -- which made a lot of sense to me at first -- failed to capture my effort after doing so for two months. I still haven't found a solution, especially when I might agonize over the placement of a comma, the rhythm of a few words, selecting just the right image, etc. It might end up changing only 20 words of a 200 word passage, but the process might take 2 hours as sentences are reordered and very carefully tuned.

I agree with you that counting every word added or deleted during editing fails to capture the point ... but when I realized that I really do spend at least 5x more of my time editing, tracking wordcount confuses me. I haven't found a working balance yet.

Good to know that other people do include their notes in total word count. I'm starting to think I need to track:
- Words (of any kind) written per day
- Time spent in writing activity
- Words of completed story per month