iPod Song Info error

I know it's the wrong place to ask, but searching for this problem on Google gives me results relating to not playing songs or some songs shown in itunes but not on the iPod.

Anyway, I was recently putting songs on my iPod Touch and getting info on the songs using iTunes. But the problem is that the info doesn't show up on the iPod Touch when it does on iTunes.
Here's an example (The song is Nagisa Lovely Radio):
What was supposed to be: (note the artist)

What I actually get:

The one on the iPod Touch was the info before I changed it on iTunes.

I just find it very annoying on how I've been spending a few hours editing infos on songs (because I like being orderly) only to not show up on the device itself.

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The tags are messed up, from what it looks like. Tags have nothing to do with the file name, the file name can be perfect and the tags can be messed up, especially if the song had Japanese text. Go into iTunes on your and change the name of the song/artist/albums that are messed up in your song library.

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I know this is going to take a while, but the best way to do this is to just input all of the information yourself.

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