Are my discs rewritable?

I had 2 discs that I messed up on out for a pack of 25. One I got halfway threw burning it and remembered I had backed it up a few days before, the other one just didn't turn out like I wanted it to. They are Memorex disc. I the label they said DVD+RW 4x. On the disc themselves they say 4x RW and DVD+R below it written very small on the left side. On the right they say DVD+R Recordable 4.7GB 120 minutes.

When I try to earse with nero it says it is not a rewritable disc. I've tried different Nero programs that earse the disc, 2 of them say its not RW, and another doesnt reconginze it.
Any ideas?

 

I have 1 that says RW but it is not, and if u just put it in and try to burn something on it with nero, it will either say erase disk (if it is a rw, which is unlikely as you have tryed above). Or it will say something like please insert a blank dvdr/rw

 

I tried before to just burn over it, and it says to insert a blank disc. I'm leaving to get a nother pack from Wal-Mart today so I'll ask them about it...I just didn't see any reason for it to saw RW anywhere if it were not, unless it meant something else.