Normally, when I switch my radarbox on, there must be about 30 alerts waiting for me.
I don't understand how alerts can be waiting for you if the radarbox is turned off.
Do you have "Activate Alerts for Network Flights" ticked on the alerts tab? Maybe post a screenshot of your alerts tab.
The scenario is this. I switch on my PC and fire up the RB. When I get to the screen that asks you to select start I do. The Radar screen comes up and in the bottom right hand corner the alert box goes from 1 to however many alerts there are, sometimes up to as many as 30. With the sound activated it sounds like a machine gun.
I've never had to clear alerts before, the list has always been there and added to and it's never been a problem until now. My box goes on in the evening for about 2-3 hours and is then switched off until I want to use it again.
In answer to Tarbats question, 'Yes' and I can't understand why there are waiting for me either.