It's not that -- at least where the cable's concerned -- I lifted that picture a while ago, and put a copy here.

It could be the case for the wall plates -- the punch block had the wires in pairs: green/g+w, orange/o+w, etc.

I wasn't sure how the wall plates should be cabled, so I just followed the pictures. This has resulted in the external cable run appearing to be a cross-over, which means I don't have to use the uplink port. This is confusing, and I should perhaps fix this. But more importantly, I get link on both ends, but packets only go one way.