Reference your Maple Prominent. Unfortunately there are problems with several maps on the site. Maple Prominent is one of them - the map on the website is blank whereas the 2011 Macro Moth Atlas has 103 records.
I have no idea why this is maybe John will be able to help. The Small Wainscot map is also blank even though there are 455 records in the 2011 Atlas and I'm sure there are others.
Several of my records don't show on various species maps either.