powerline utility + adapter problems

I'm using xav5001 adapters between my router and computer, which is a stretch of about 6-7 meters and 2 different powerlines inside the house.

what is 2 different power line inside?

You have one XAV5001 and other non netgear brand for power line?

But I achieved better signal when I moved it to another outlet, then I got around 30 mbps, and even ~50 mbps when my wife turned the tv and sorround system off.

Usually noise the line can constantly change the speed you will achieve.

So I guess it's just mayor interference from those devices. Better find a better solution to the wirings in the livingroom :P

If possible I would do that...