Songs database imports

[slammin]

Looking through the threads I found a message that said the ONLINE DB sends back if DiskID found artist in First name, Last Name. However the local DB returns artist in Last name, First Name.
What I am trying to figure out is why? What I am finding is that many DISK I have, specifically NUTech SAV-XX are coming up as invalid disk ID from the original purchased CDG. However the online DB returns the correct list of songs but has artist as mentioned earlier. Clicking the Local DB returns partial song listing with Artist reverses. LN, FN.
I am rebuilding my library with over 300 Disk and this whole process is confusing me a lot. Can anyone clear up how the process is suppose to work so as to keep the amount of information I have to enter at the very minimum. I really don't have a preference of artist name order just want it to be the same on all disk.

Bob