Your files have no existing tags, hence Picard tries to guess track number and title from the filenames. In the automated ways it tries to find certain numbers. You see how it used the initial number and assumed it to be a track number, then used the rest as the title.
As sophist pointed out above, this might have little relevance to the lookup. You can still try to cluster the files and lookup matches, and then tag your files with the data found on MusicBrainz.
But there are also some things you can do about the guessing:
- You can turn off the track number / title guessing in Options > Metadata > Guess track number and title from filename if empty. Then Picard won’t extract the initial number and use the full filename as the fallback title. It won’t change the tagging situation much, though.
- Use Tools > Tags From File Names to fill in disc number, track number, artist and title from your file names.
The second option is interesting in your case, as you have very well named files always having the same patter of disc number, track number, artist and title.
Load the files into Picard, select them and open Tools > Tags From File Names. You have to enter a naming pattern, in your case use:
%discnumber% - %tracknumber% - %artist% - %title%
Click “Preview” to see the results, it should show something like the below screenshot:
If you are satisfied, click Ok. This will set the tags for disc and track number, artist and title for the files inside Picard. It will not yet save the tags to the files, for that you have to actually save the files. If you only want to save those initial tags and not move / rename the files at this stage, make sure you only enable “Save Tags” and not “Move Files” and “Rename Files”.
You don’t need to save the tags at this stage, though. Having those tags properly set can also help with clustering and lookup and help you find the proper matching releases on MB.
See also the documentation: