Calendar sync question

Does the zxmobile calendar sync only sync events 2 weeks out? I am experiencing issues when I enter an event in Zimbra that is two weeks + 1 day out from the current day it will not display on my mobile device. I can add events on my device that are past two weeks, the calendar entry will display on my device for a brief second or two, then it dissapears on the device, but it does show up on my Zimbra calendar. Is this behavior expected? Is there a way to change this?