The unpost journal report does not show a posting sequence because there can only ever be a single sequence at a time, and you do not have a choice of which sequence(s) to print or purge. No posting sequence is maintained for unposting batches. If this is what you are concerned about, then this is not a problem.

The screen picture you attached shows the 'Next Fiscal Year' 2012 selected, which I presume is where the most recent batch unposting occurred. And because there is no text on this screen that says 'there is no posting journal to print', then there is an unpost journal in the data. Click the Preview button to see the report contents. You must print this report either to paper or a file (not preview) in order to get the question 'Do you want to clear the unpost journal?' and choose Yes complete the purging.