Sync with iTunes, no longer takes info from iTunes library, but the file itself. What do?

W

WPCentral Question

So, this happened *recently*, as in... it wasn't doing this at first, then when I went to sync with the Windows Phone for Desktop app, it starting doing this to almost ALL of my music files.
I sync with iTunes, but it is no longer using the information that I have put into iTunes, but the raw file name itself. If that's the case, what's the point in even syncing with iTunes?

Is there a fast way to resolve these file name issues without having to manually tag each file? (Hindsight, yes I should have done this in the first place, but 700+ files later, I'm not doing it and it was working fine to begin with).

For clarity, I have an album by The 1975

The information is as such

Example 1.
Artist - The 1975
Song Title - The 1975 - Talk!.mp3

Example 2.
Artist - 30 Seconds To Mars
Song Title - 30 Seconds To Mars - The Kill.mp3
 

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