iPod Touch adding songs problem

So I got my iPod Touch last week at Best Buy and I had to get it replaced due to a deformed unit (the chrome steel is deformed, and the glass isn't snapped in correctly), and I got this replacement and I am worried this is another faulty unit. When I started adding songs from iTunes into my new iPod, two of a rather small batch of songs ended up corrupted. Is this normal or is it a faulty internal flash memory (or other parts of this iPod)?

Please help.

EDIT: re-uploaded the two songs and they play fine, but my question still stands. Is this a sign of a faulty flash chip with faulty blocks or memory cells?

 

Corrupted as in they won't play a sound at all. I compared file sizes and these corrupted files were smaller than the copy in my iTunes.

 

On iTunes under my iPod's song list I right-click it and clicked "Get Info."

It should pop up a window with brief details of this song. One of them would be the size. I did the same to the other copy in my iTunes library and both sizes differ. The iPod copy being significantly smaller. It must have dropped in the transfer or some of my flash chip has a bad block or two...

 

So I went through all my songs on this iPod (that I haven't yet listened to) and found two more.

 

Well I plugged my iPod into another computer and copied some songs off there. A song I downloaded from the iTunes store ended up corrupted as described so this shouldn't be an issue with the file formats. Another file also ended up corrupted.

 

Yes I can.