Sad to say it may be the dvd burner. Out of all hardware some is good some better. Whenit comes to DVD burners, I found out just like you, the hard way.
If the burner does not have the Pioneer chip set it is a peice of junk that will never work right. I bought the samd DVD burner you have It is made by BTC and has been rebranded in your case. Your only hope is to return it even if you get store credit and it probably was expensive too. Good models are Pioneer, LaCie, Benq ( except the DQ60 rebranded Teac) NEC, Plextor and LG
this is what i have ( will burn dvd'd all day long and double layer also)
I also have an LG can not seem to find the model, here is the LG page, mine started with GSA , i think it was 16xx something. I guess they redid there model numbers
oh well get the NEC, great drive and only $29