Never picked up on the three times thing before, but that's a contradiction too, innit? I mean, I can suspend disbelief for plenty (like the corpses in The Unquiet Dead not having their mouths tied closed, or the "reverse the polarity of the neutron flow!" bit, or the sonic screwdriver doing pretty much whatever the Doctor needs), but if it contradicts previously established facts of canon I'll be all wtf?

Of course, it could be that I just overthink things. xD