e35b LMM Injector Balanced Flow Rate Readings

I am doing an injector balanced flow rate scan with my AutoCal and Efi Live after picking up on something that dealers do when trading in a diesel. Anyway, injectors 4-8 look very very good with readings between -1 - 2. However for injectors 1-3, the scan shows -512. Does this mean that efi live is just not reading the injector performance or that the injectors are bad.

Note: I don't appear to be having any issues with the truck. First start of the day and a little white smoke is shot through the exhaust after that, no issue. The other day however, I did notice a more than normal amount of white(ish) smoke coming from my PCV delete hose.

Any advise or input?

Thanks.
Networkan
08 GMC Sierra 2500HD (LMM)