I'm visiting this site for already a year, and can't remember any game adjusted up.

MGS4

On a weekly basis everything is adjusted up/down slightly, but it's usually not very noticable.

On a larger scale Mario Kart Wii was adjusted upward a couple of times, and I am sure there have been a few other big game adjustments I can't recall.

SFIV was also adjusted up.

Halo 3 got some upwards adjustments in the last weeks

UFC
InFamus

It needs to be corrected.

Everything is slowing going up and down depending on new information on the sales...

You think they are only adjusted down because people make a huge fuss about it. Most the adjustments up go with little fanfare.

For example, if LBP was on the edge of 1m sales, and passed it, got adjusted down, then repeat it would be all over the place as people complain about a game they like having less sales then they thought.