How do you completely know that Clean Out Your Junk Drawer comes before Phil's Sexy, Sexy House. I see that you put a link there, on the link page it does say you are correct but on wikipedia it says that it comes after Phil's Sexy, Sexy House. My point is how do you know it's a reliable source, because right now I think both your link and wikipedia are unreliable sources.
The futon critic is a reliable source for episode titles, numbers, and airdates. It shows that Phil's Sexy, Sexy House is episode 708, but it airs before episode 707, Clean Out Your Junk Drawer. The episode number of Phil's Sexy, Sexy House is supported by ABC's official press site . You're right to cite Wikipedia as an unreliable source. The info there was probably added by someone who only took into account the air dates.
Contrary to the episode order as decided on by the writers (and thereby, the correct one), the order of broadcast is actually decided by ABC. I'm assuming that because of the hiatus between 706 and what was supposed to be 707, they didn't have enough time to air all the episodes before winter hiatus, given that they have two thematic episode (708 for Thanksgiving and 711 for Christmas) that need to be aired before said hiatus. So, they needed to get 708 out before Thanksgiving, making this Wednesday the only available spot as they never show new episodes the week of Thanksgiving itself, and thereby switched 708 and 707. Same goes with 711, that has to air before the hiatus, thus pushing back 709 and 710.
Well, normally I'd go for production, but since this Wednesday it's also clear that the storylines are airing in order (since the events of Phil's Sexy, Sexy House have already happened there), so I think we should change it after all.