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Did you try a different software, which I am 100% sure that will reports the same?
Probably this is an import from the store you bought them. I wouldn't recomment them.
Thanks for the welcome.
I have received the same results burning from three different programs; Nero, Ulead MovieFactory, and DVD Decrypter.
I get the same 'media block' report from two different drives.. my burning drive which is an NEC 1300 and a Samsung 616F DVD-Rom drive.
The NEC reports the disc's as DVD+R disc's before burning.. or else I would not be able to burn them to start with.
When I use the 'CRC' testing routine in 'DVDInfoPro' the burned disc's report no errors on either drive and the disc's play back on all four of my set-top DVD players.
I no longer have the UPC from the packaging from this 'CompUSA' brand disc's but did post a media report at VIDEOHELP.COM when I first started using the discs... but above the UPS it listed 'AML'??