I saw a link on the digitalhome forums re this.
Apparently it is not normal function for the remote to do so, but can be programmed the way you want it.
If I can find the link again I will post it (on mobile right now so can not look it up easy)
Still can not find the exact spot.. but it my have been part of this thread.. may be worth looking through the posts on it.
you can reset the macros, by following these instructions:
Programming the Master Power Key