Last spring after the clock shift I had a week when every autotimer kicked in twice: once in the correct time and once an hour off (I think it was 1h after the actual showtime, but am not sure).
Also the EPG showed every program twice, which I believe was the reason for the funny behavior of the autotimers.
I guess the EPG data for 7 days was once received from the epg feed with wrong time information, and stayed there until those days were gone.