I am trying to create an event that occurs every wednesday forever. I use following RRULEs but I am getting different results.

Both use cases had the same first DTSTART: 20171026T030000Z

Case 1 (Correct/Expected): 

RRULE:FREQ=WEEKLY;WKST=SU

RECURRENCE-ID:   20171102T030000Z, 20171109T030000Z, 20171116T030000Z, 20171123T030000Z

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Case 2 (Off by 1 day):

RRULE:FREQ=WEEKLY;BYDAY=WE;WKST=SU

RECURRENCE-ID:   20171101T030000Z, 20171108T030000Z, 20171115T030000Z, 20171122T030000Z


Please note the results in second case are off by 1 day. 

What could be wrong?


Best Regards,