I don’t think this is correct. I poked around in Comp Rules (in case this changed recently and I was unaware of it), but I don’t see anything to support this. Point me to a section, would you?
I’ll PM you some details once I get home and have access to my MTG-Rules-L archives, unless someone else posts and says they think it would be of general interest. I tend to leave these kind of super specialized discussions in small circles because the game is complicated enough for most players without getting into this level of detail. In a nutshell the genesis of this ruling is from cards like Balance, Pox, the Commands cycle, etc. If a card has multiple sets of instructions for one effect, you follow the instructions in the order they’re printed on the card. That’s why for Balance you equalize Lands->Cards->Creatures. While technically it’s one event from a player’s PoV, there is a pseudo time order involved. Cards which care about time order can see this and use it.
MTGO has all sorts of stuff implemented incorrectly. There’s a guy in my playgroup who mostly plays on MTGO and he’s a good player who knows the rules pretty well, but we butt heads sometimes over differences between how MTGO works and how M:tG works.
Remember Painter’s Servant? He said online it makes all your lands produce whatever color of mana you chose when it came into play. That’s pretty crazy stuff right there.