Neither did I. There is one more scenario though, there is the case where a users adds a file with no group. After looking at the history it looks like exp had actually fixed the generic problem the first time around because I didn't receive a notification for episode 120...
exp wrote:the file was originally added as released by "no group".
do you have any group-less file of that anime in your mylist?
I didn't think I did, but I went through ep by ep and found a case where I had a "no group" file in a filler ep... I have changed this to generic, so hopefully it will not happen again.
I didn't get a wrong notify either, just the "DB" one mentioned above. But I wouldn't know whether the bug is fixed since I don't know if somebody added files for double episodes in the past days..