We just released version 0.6.4 of Agilo which fixes, beside some minor issues, the problem related to multiple calculated properties, not being correctly "interpreted".

Now you should be able to write expressions in the form:

[agilo-links]
allow = story-task
story.task.calculate = total_remaining_time=sum:remaining_time, \
                       total_actual_time=sum:actual_time

(Omit the backslash in the real trac.ini)

Which will allow to have multiple calculated properties on a link. This feature was planned to work from the beginning, but we never really tested it through and none, till some days ago complained about it not working :-) See this group discussion: Problem with calculated properties

Of course this feature is already ported and working in the new agilo 0.7, that we hope to be able to release as a public BETA within the end of July... 2008, yes ;-)

Thank you for contributing in making agilo better ;-)