Two year tags

I've noticed that if I tag the year field like "XXXX-XX-XX", it won't appear like that on Winamp. However, if I tag the year field like that using TagScanner, Winamp has no problem and shows it just like that. But after tagging the year field on TagScanner and checking the tag on Mp3tag, it shows two year tags. I just want Winamp to show the year tag like that; year, month, day.

First, I always get the album info using MusicBrainz Picard and it tags the year field like "XXXX-XX-XX". Then I get information from Rate Your Music using Mp3tag. At this point Mp3tag shows the year tag just like it should but on TagScanner there's just "XXXX". Winamp shows what's on the year field on TagScanner.

I hope I made some sense. I'll try my best to answer any questions.