TL:DR - turn on the ID3v1 support.
Full details…
Now I see what you meant by “title number”. Just a translation thing. I have used screenshots below from a GB version of Win7. This will make it easier to line up the different languages.
I was tagging with Picard on one of my Win7 PCs at the weekend. For the tags in MP3 files I have Picard set as follows:
That is giving me Win7 details as follows:
File details:
I also use UTF-16 on another Win7 PC and that doesn’t seem to make any difference.
Now please look carefully at that folder I have in the second image. Look at track two. Both the “TITLE” and “CONTRIBUTING ARTISTS” are truncated. The band is “Carter the Unstoppable Sex Machine” and not “Carter the Unstoppable Sex Mac”.
So that is showing that Windows 7 is relying on the ancient and basic ID3v1 tags. So make sure the last tick box on the metadata options page is ticked.
Please also compare with a Win10 image of the same thing. Here you can see the FULL track names of track 2 and the full band name. That implies to me they have probably upgraded to ID3v2
And one last thing… I can explain the “oddity” in your example album. Install MP3TAG www.mp3tag.de and you will find that it can show you which type of tags you have in your files. I bet that your track 2 has both ID3v1 and ID3v2 tags with all your other tracks just having ID3v2 tags.
(Little tip. In Win7 and above there is a program called “Snipping Tool”. Ideal for taking shots of bits of the screen. They can then be pasted DIRECTLY into this forum without needing to Save to File. A very handy trick)