I also had this problem and sent him my calendar file with all my events for him to test with. That was quite some time ago and without an update I moved to getting the sync directly from Google inside the GPE calendar. This appears to solve my "re-occuring events on the wrong day and time" issue. However, this sync process inside GPE seems to take a very long time (understandable, due to the number of entries I have) with no indication that it is actually updating. Waiting long enough and it does work.