By default there are displayed only active requests on My Requests page. As soon as request is finished, status of it is changing for "Pending" and will stay in such status until buyer makes final decision about your offers. You may follow the status of your offers and requests any time.
So if your request is ended, you need select "Pending/Ended" status to be displayed
or to uncheck checkboxes near "Participating" and "Not yet participating" statuses
