If it is wired like this it is wrong. He has dual 1 ohm subs and he would be wired to .25 ohm and the amp is not stable that low.If I'm not mistaken isn't this what you want?
Could be, if so then he is wired at .5 ohm which is still to low.By his post it sounds like he only has one coil 1 on each sub connected to the amp and coil 2 is connected to itself. He may have worded it wrong though.