Thank you for the link to this plugin. The reporting plugin looks *very* interesting although it doesn't address what I was looking for. But I think that I posted this into the wrong forum because it's not really an analytics issue -- maybe I should post it to the User Profiles forum.
Here are the Screenshots I was referring to:
Moodle 1.9 User Profile activity report:
All the Online assignment postings are displayed in reverse chronological order here.
Moodle 2.5 Actvity report > Outline
Here there are several weeks missing after 24 August.
I think it's a bug in the Questionnaire -- when I move the Questionnaire activity down the Weekly Outline the assignments and forums listed before it are displayed and those listed after the Questionnaire are not.