Yes, I'm with you on this one. I just did an export from Yahoo Calendar
and re-imported it and then realised that when you export a "Repeating"
event from Yahoo it just creates a non-ending string of events which,
because they're not a single event repeating you have to edit
Created a Google repeating evening in about 10 seconds to replace them
all ... got 250+ events to delete. Very frustrating!