it happened to me a while back... I did what I've done on another forum when it happened...
go to control panel and change your settings (to weekly if you have daily, daily if you have weekly, etc)... make sure you click save.
Wait one full day (I've found it takes that long to cycle)... then go back and set to your normal preference.
I've also (on a different forum) changed email address for one day, then back to original email... I haven't done that on CalGuns, but it worked on a car forum that I had this problem with.
Each time I've had the problem I posted (like OP did) - but it didn't get resolved so I went through trial and error and found what worked (what I posted above).
It's a bit of a pita - but it's the fastest way to get it back to normal.