I have been noticing that in some cases, the track number is not added to the tag when using auto tag. I can manually go to Amazon.com, find the track numbers, and add them myself, but this takes allot of time.
I cannot give exact times this happens, Sometimes it works correctly, sometimes not.
Yes I have all the options for auto tag to overwrite existing information except for the comments field . I also have “use additional source” checked.
It might just be that your data base does not have that information and it is not checking amazon for it.