The phone is an Andriod phone, and the software is controlled by Google. So I would recommend checking out the cell phone forums. Unfortunately, while we make the hardware, we don't control how the software works.
One thing you might check is to see if the sync settings allow for the phone to replace entries. If you want to update through gmail or Google calender, you might have to turn off that feature.
I am trying to put a date on my calendar in my samsung moment evry 2 weeks,and I don't seem to be able to do it.I sinc it thru google. Can anyone help?