MCC=Mitsubishi chemical corp.
So it is a Verbatim, right?
Try it with 12x, if you can.
I thought you have a PIONEER-"Burner". ^^
So, what is the model and FW, of your DVD-Writer?
If you have a Pioneer, you should be able, to write to it with any speed, from a specific model and upwards.
No, the middle, of highest and lowest speed mostly is (so in this case exact 11), but this "emotion"-dvds, simply should be relabeled Verbatim, but I'm not sure.
The best is, if you "waste" a DVD-R, to know, which is the best speed in your case.

Try to scan a DVD for C1/C2-Errors after burning (i.e. with "Nero CD-DVD Speed", even if it is not that good, it is enough.)
Btw.: I think, they are certified for 12x, even if I don't know for sure,... :-/