Hello again,
I've seen that if the datacollection setting is set to append you can get old and new datacollection information in your database. If the object is removed all datacollection info is also deleted. If you would run a discovery a datacollection should collect the latest data like bios info.
You could try a datacollection with WBEM information and compare is to the baseline. Then run the same discovery with SNMP credentials after you deleted the system once again to see if you get different info or fields order. Also check the dstacollection report to see if you see the multi list for the bios with different versions. Was youf setup an upgrade? I ask this because i had problems with the buildin reports after updates.
