Import of ics when using repeated dates causes duplicates

When using repeated dates with the module the ics adds the repeat rule which causes duplicates in the calendar.

For example if you repeat the date every week for 2 weeks you get 4 posts in your calendar instead of 2.
week 1 = 1 post
week 2 = 2 posts
week 3 = 1 post

It seems the calendar treats every repeted date as a new date to repeat.

When removing this lines from the ics it works as it should:
RRULE:FREQ=WEEKLY;INTERVAL=1;BYDAY=TH;WKST=MO

The 7.x-2.x dev version from jan 2013 works.