I'm stumped with Aggregator and would like to see if there is anyone able to point me in the right direction.

I am reading in a number of individual feeds using Aggregator. With each feed, I created a title and set the url to be something like http://webapps.css.udel.edu/calendar/index.php?format=rss&topicid=1.

These feeds populated with the appropriate content when I created them, however, I've recently noticed that the feed is no longer updating inside my Drupal site. As I began investigating this a bit, I found that when I click on "update items" that the link is getting rewritten to http://webapps.css.udel.edu/calendar/index.php?topicid=1. The "format=rss" was being removed.

I went into the table for aggregator_feed and saw that the link field shows http://webapps.css.udel.edu/calendar/index.php?format=rss&topicid=1 and the url field shows http://webapps.css.udel.edu/calendar/index.php?topicid=1. I edited the table for aggregator_feed and set the link field to be http://webapps.css.udel.edu/calendar/index.php?format=rss&topicid=1. When I visit the aggregator feed page, the posted URL is what I'd expect (with 0 items), but when I click on "update items", the value for link gets re-written again to be http://webapps.css.udel.edu/calendar/index.php?topicid=1.

I'm not sure that this will solve my problem of items not updating, but it doesn't seem like the link and url should be different or that the information should change when the "update items" is clicked. Is anybody else seeing this behavior? Any thoughts?

Additional notes - I'm running cron hourly. My site is running 6.13.

Thanks! Tina