Changing CI Type results in Device type changing

Changing CI Type results in Device type changing

Using 8.1 Patch 7
SQL 2008 database
 
I created 3 new CI types under Printer of Inkjet, Laser and Thermal.
 
On CMDB view I then viewed the printers and selected out groups of them , by ticking the device and modified the CI type from Printer ( default ) to the appropriate Sub Type created, by using the ACTION button and choosing Modify CI type.
 
The CI types changed as expected.
 
What I have now noticed a week or so later is that the Device type has changed as well. I think it changed to the type of the first ( or last ) in the list, as it is rather random, but in batches of printer types.
 
So I had a HP OfficeJet 8500 that has become a HP Deskjet 460 as an example.
 
Obviously this functionality can't be expected behaviour , has it been found previously and how quickly can it be fixed please.
 
Regards,
Andy

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