I've experienced this quite a bit in the past. Not sure why, but even though I've been logged on every day, somehow I find myself logged out and then when I go back in to collect my daily quests after logging back in, I see that my weekly and monthly numbers have been reset.
I'm afraid that I'm going to lose out again. It hasn't reset but I didn't get credit for today. I wasn't awarded 500 points for logging in to the 3 sites and I didn't get 50 points for buying a picture. I also noticed that it still reads 7/7 days for weekly (I reached 7 days yesterday during the day) and I'm still at the same number for the month 26/30 (not sure why I haven't received credit for every day since I just got 7, it should be 28/30). If it gets reset, I'll let you know.