For the past few weeks, my Session Target has gone to a negative number every time I hit reset. Right now it’s -102 but it isn’t always. I haven’t been able to come up with any rhyme or reason for it. The only way to get it back to 0 seems to be to restart Scrivener.
I’ve been having similar issues. In my case, also the manuscript target doesn’t show the correct number of words. It shows much less of what it should be. Checking and unchecking “documents included in compile only” has no effect whatsoever.