I have a lot of out of sync. is there any way to know who change the config
There is a bug where Common Services Discovery will not properly resolve IPs to hostnames. This only affects CS 3.1.1 (i.e. LMS 3.0.1). A fix is forthcoming with LMS 3.1 in June. In the meantime, you would have to add local hosts entries for your devices, or manually add the hostname to DCR.