Benq 1620 Retail B7V9 RW problems

Have two Benq 160 Retail burners here both with B7V9 firmware and both have problems with burning RW media. One Benq can not properly burn CD-RWs properly. It goes through the process but gets errors. I can use an LG CD burner with no problems on the Verbatim media.

The other Benq burner will burn DVD-RWs fine but if one attempts to read them after say Windows has been restarted the disc is unreadable.