If you check your individual profile on nostr.band before and after posting you will likely see your most recent post but your posts and replies count won't have changed. That's what it looks like for me.
🤔🤔 But surely these stats for yesterday's active users and the day before can't be right? Or... 👀
Correct. On primal you have: 2793 posts (including reposts) + 7657 replies (10450) On nostr.band you have: 10175 posts and replies + 127 reposts (10302) so your stats are missing 148 posts, replies and reposts which I assume is approx equivalent to the last few days for you. For me it's less than 20 different but that fits well with the time the graph starts to flatline.