Activesync Multiple Partnerships Problem

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Hi folks - I recently upgraded to AKU 3.3 but had this problem with 2.2 as well. I sync my 6700 with my home and laptop computers and can no longer sync calendars, contacts and tasks with both computers. when I try to select, for example, Contacts under both partnerships, I am told "you can only synchronize contacts with one source...". Has anyone had this problem? I uninstalled Activesync 4.5 beta 2 and reinstalled 4.2 to see if that would help but no go.

Any suggestions would be appreciated!