So you added metadata to some WAV files and uploaded them to Songspace, but it appears that your metadata has disappeared. Where did the metadata go?
Songspace does not recognize metadata attached to WAV files as WAV files only support a very limited amount of tags that most apps do not support.
We suggest converting the WAV files to FLAC files. Doing this will allow you to add metadata to the file that will transfer and you won't lose audio quality. There are several websites and apps that allow you to convert your files.