Strange results of the powershell inventory

Hi folks,

I have a script (provided) with which I am doing an inventory of computers. in the org units. In one of them after the script I got a strange result. (Table attached). What means the values ¿¿in columns "ip address" and "MAC address". and how to get normal values¿¿. And the second small issue, is what means value ¿in the column "Motherboard":  to be filled by O.E.M  

Help me, please
sys-object.csv
Inventory3.myapp