Hi Stewie,
If your renewals span over more than one page, the best thing to do would be:
1. On page one, select all the domains you wish to renew
2. Click the "Renew mark selected" button
Note: this doesn't renew the domains
3. Click to the next page and follow steps above
Once you have gone through all the pages, and "Renew marked" all the domains you wish to Renew, go back to the Expiry Control page and select "To Renew" from the second pull down menu under the Search heading. This will display all those domains you marked for renewal.
I would then suggest downloading the list of domains, going to the Manage > Renewals page, and completing the renewals in bulk there.
Otherwise, you can click the down arrow (in the Options column) on the top domain, which will select all domains on that page. Then click the "Renew selected domains" button.
Let me know if you have any other questions.
Cheers,
Mike
Fabulous.com