I personally think it is to help fight against piracy. By having big releases or hardcare games that might be more likely to get pirated with system updates it forces hackers to lag some giving them a chance to sell more, just my thought.
On the rearranging channles, I have only had this happen if a channel was removed by nintendo the others seem to move to take its place. I forget which ones but I believe a few channles have been discontied or new ones added. not sure though. I did have mine organised a certain way also, and after a long dry period with my wii they were mixed up, I figured it was a system update.







