At the moment, templates are only capable of generating the "external access" URL format used in Alfresco web-client. These URLs are designed to be copied into emails etc. or pasted into browsers to give direct access to a folder/content. However at the moment a side-effect of the fact that the external URLs must interact with the JSF client architecture is that they need to logout the current user before attempting to show the requested item. We should be fixing this issue for 1.2 as part of the Guest Access refactoring work.
The POST actions are used by actions in the JSF client framework, they are not bookmarkable and as such create the issue whereby we needed to come up with a different mechanism for external URL access to objects.
Thanks,
Kevin