Unable to edit iTunes song info

Here is the image from the advanced security of iTunes. Every option has "full control" and I checked the child object permissions (blacked out info is just my name).

This is what Get Info looked like. I can click on a box (like song name) and the cursor will appear, but I cannot type (the song name was entered previously).

I believe they are all MP3 files... I'm not sure what else they would have been.

Other than that, none of the files under the iTunes folder had the "read only" checked. Some had hidden, and some had the box (meaning, I believe, that this option doesn't apply to this data type, because folders can't be read-only), but had read-only checked.

I've done all the steps for the first part and all the security seems to be in order. When I tried the second, about tags, I don't have that option. I have access to File > Convert and see the option for "Convert ID3 Tags", but it (like all the options) are grayed out.

Alright, I ended up fixing it by downloading another software (Sharepod), which synced everything properly. I'm still not sure exactly what was wrong, but it is all working now. Thank you for all the help!

EDIT: Spoke a little too soon. I can now edit the copies of the music I transferred from my iPhone to my computer via Sharepod, but if I add another song to my computer, it will not add to my iPhone, even after syncing. I cannot edit the song info on the songs on my iPhone still.

It seems I can't edit again, so I hope double posting is allowed. I think it's fixed now. Fingers crossed. It seems normal not to be able to edit song info on the iPhone copy of the songs, but you can on the computer version of the songs. I added a song and this time it successfully synced. Hopefully, it's fixed!