Birthday reminders keep coming back

Hi guys, I'm enjoying my z10 for over a week now, got some issues I read about on CB don't care really cause the phone is so damn awesome :)!

Having one small issue though, I added 2 mail accounts and fb to the hub, I switched of birthdays for fb, but birthdays still show on my calender and lock screen. Even after I delete them in my calender they keep coming back. By any chance am I doing something wrong, is it a glitch or am I overlooking something completely?

Thank in advance for the help!

Posted via CB10

I think it is FB itself. I get the same thing, and on my PlayBook too. I even get notices for the wrong date, which is embarrassing to say the least. I had the same problem with Facebook on my Torch. So that is 3 different units with the same errors. Three units that otherwise function properly.