Incorrect Error messages

G'day folks:

The following 2 Error messages are generated by the Validator from this 
page <http://www.lancsarchsoc.org.uk/programmelisting2012.html>.

 1. Error /Line 51, Column 148/: No p element in scope but a p end tag
    seen.

    |...ions to Morecambe and Downham, with appropriate commentary.</li></ul></p*>*</div>|

    ?
    <http://validator.w3.org/feedback.html?uri=http%3A%2F%2Fwww.lancsarchsoc.org.uk%2Fprogrammelisting2012.html;errmsg_id=html5#errormsg>


 2. Error /Line 73, Column 123/: No p element in scope but a p end tag
    seen.

    |...rough grazing and the re-introduction of sheep that we see today.</li></ul></p*>*|


You will notice that, in reality, each p end tag DOES have a p start 
tag. For Line 51 the start tag is at Line 41, column 242. For Line 73 
the start tag is at Line 64, column 2.

Why is the Validator generating incorrect messages, please?

DMS