Not sure about wobbling...we lost our last game I suppose...if that's a wobble. Porto is still going to be a tough challenge (they are also 4pts clear in the Portuguese Liga I think) so indeed it's not a definate progression for Manchester United but I think we are saying we have a better chance against Porto than the other teams in the draw...which I think is just being honest.
It's two games - it's official - it's a wobble, lose another and it'll be a fuckin' big wobble.