I don't want to get into the pineapple thing again - its been DUN to DEATH! No matter where that discussion goes, there is no satisfactory explanation involving the killer that makes sense.

I do, however, think there is good reason to believe that there were a number of signs that there were "things" out of place, not where they should be, inexplicable indicators that there might have been even MORE things missing or out of place in the house. The Ramseys awoke to a nightmare, incapable of noting details and perhaps the household was not ordinarily 'orderly' enough for out-of-place (don't look right) things to be noted by them. I suspect there might have been OTHER things that were amiss.