Problems downloding from itunes

You said "I download music from iTunes and the whole playlist isn't downloaded, I get some of the songs listed in italics with an italic circle by name of some music ".

Download from where? Do you mean sync from your iTunes library?

Where is it italic? on iPod In iTunes on computer?

Can you post a screenshot of what you see?

Do the songs play OK in iTunes on the computer?

A few other users have reported the same periodic problem and I have not seen a solution since you already restored the iPod

The way I see it, there are only a few reasons as to why this would happen.

1) Your iPod is running out of memory space, and your software can't stinking cope. This is plausible, especially if you're using an older Mac, Windows, or Linux. My iPod does strange things to cope with a bad USB connection or low memory (such as ditching album covers, artists, and even sound layers on the audio file when it gets shoved onto the device) but it's Gen4, not 5, and it runs iOS6, so maybe yours copes by making songs in italics that act all derpy and then ditching some songs that it just can't handle.

2) As I stated above, your connection to the computer (or the Internet) could be shaky, and your device isn't responding right to the input.

To consider other options, I will need more information. How many times have you restored? How old is the device? Have you ever attempted to jailbreak? If so, did you succeed? How much data is being used on your iPod, and how much space do you have free?

Apple does not have an mail address when you can send such things.