Occasionally Lansweeper will pickup a computer when it is being imaged. During the imaging process there is a limited amount of time when it is on a workgroup and not domain. Sometimes Lansweeper will pickup the computer and add it to the DB. After the computer is done imaging, it will be on the domain and Lansweeper will scan it again.
Everything is identical between the assets, except one is workgroup and the other is domain.
This doesn't happen too often as the amount of time the computers are in a workgroup is low, but it is an annoyance.