sleep training/baby proofing...the cat?

So, I think I've figured it out. Its not Miles' - its the cat.

Shortly after bringing Miles home from the hospital we realized we had an issue. The cat, whose bedroom privileges had been revoked, became disgruntled and crafty.

For the benefit of our nanny (and the house in general) the cat spent a couple days a week in the bathroom. Mind you, he had all the comforts he needed for a nocturnal being - food and beverage, an open window, things to hide in and lay on, his box, things to play with if he so desired... but he was not satisfied with this arrangement. So assuming the sounds of a thief, he learned, in one reportedly frightening hour two days into his daytime confinement, to open the bathroom door. We can best deduce that he learned this by repeatedly jumping from the counter onto the lever door handle. Once he mastered this, he could not be stopped. Now he simply reaches up and flubbers the handle a few times until the door of choice creaks open. Well, we simply could not have this. The day after I woke up in the night to noises in Miles' room and spotted the black creature getting comfortable in Miles' crib - we invested in lever door childproof apparatuses, years before we would need them for our son. These really aren't so bad though David is not impressed at the way I tend to leave them a little incompletely set much of the time (hey, they click when latched which could potentially wake the boy during a precarious nap.) Have you ever counted the doors in your house? Times them by $7.99 plus tax and you'll realize why we don't have these devices for each and every door yet - just the vital ones so far.

(One comment: all day, every day the cat SLEEPS. Only when it is restricted from certain activities does it apparently feel the need to combat those restrictions.)

Anyway, we've recently tried "sleep training" Miles who is already a pro - sleeping an average of 11 hours straight in the night. The problem is this: no matter what time we put him down to bed he religiously wakes up around 6 AM. This means that if we have a particularly late night, he gets considerably less sleep overall because he will not, does not sleep in. WHY. This is the question. My conclusion? It must be the cat. This is the evidence:

Whenever we arrive home, no matter if we leave for 10 minutes or 10 hours, ALL doors lacking the large plastic handle covers are opened. We've come to accept this as a manageable nuisance, until recently it has come to our attention that the cat carefully schemes to also open the doors in the early morning hours. This is now known because I now find myself laying awake in dreadful anticipation of an all too certain early morning diaper. This door unlatching is a noisy endeavor including multiple doors spanning two levels of house and is undoubtedly what wakes Miles.

The solution seems straight forward enough: simply open all the nonchildproofed doors before going to bed. I don't trust it though. Something tells me the cat will find other ways to irritate the household.