Could you try removing the affected machines and rescanning them? If the problem persists, that means that DNS cannot be resolved or the host name cannot be found.
I installed the latest beta. The hostname from SEH Printservers is now used for "NAME", so we can search for it. Great ! But for Kyocera Printservers (which definitly have a TCP/IP hostname set) in the field "NAME" stands "Kyocera Command Center" which is the title of the http-site. Could this behaviour be changed ?
Our latest beta does handle host names differently. Version 4.2 of Lansweeper uses the host name as display name if it is detected. If it is not available, other information is used.
So you might be interested in our latest beta installer. You can find it here. We recommend performing a database backup before applying any updates.