Ok, sorry I have to correct myself (mixed it up myself before): the parcels there are absolutely correct showing only the parcels marked as "show in search".
But for events, in your joomla database another table exists, called #__opensim_search_allparcels (replace #__ with your joomla prefix). In THIS table should be at least as many parcels as regions are online. Probably more if a region contains more than 1 parcel.
Looking at this, I think it might be a good idea to display this "all_parcel" count as well on that page in a futuring version to have an easier overview if everything works correct.
