The default top server admin levels & roles have been adjusted to 2 to accomodate a new admin trigger - !updaterace
After that !lostmaps may show a higher number - give it a minute, try again.. a few times and it usually gets them all. It's because we now have 441 maps, and the working limit is around 300. A mod to the scripts and this new trigger allows it to find newly uploaded maps... eventually.
Thanks PHS for the pointer to the fix.
*edit* This has since been restored to 5 while still working with !updateraces.. there was an issue initially where I hadn't configured it to tie in properly with the rcon levels, so was reverting to it's internal defaults.