I have already taken 3 screenshots, one of them is of the music settings 
Ahhh ... yes you did. I didn't scroll down far enough to see the music configuration.
So despite the fact that you have it configured to only sync selected playlists, -everything- in your collection is being synced every time you initiate a sync? All music tracks, whether or not they're in a playlist? And -all- playlists, whether or not they're selected?
If that's the case, the only thing I can think of to suggest is deleting the current configuration and creating it again.
What version of MB are you using? And it it installer, portable, or store?
Which WiFi Sync app are you using? The original, created and posted by Steven? Or the somewhat newer APK that attempts to get around Android's restriction on what folder is used on the Android?
EDIT: Typo