Multiple roll over/out + attachMC = wrong coordinates of attached mc

Question

First the code:
att = function (prev,nex,coox,alf) {
    attachMovie (nex, nex, _root.getNextHighestDepth());
    nex=eval(nex);
    nex._x = coox;
    nex._y = 160;
    prev._alpha = alf;
att(LetP,"LetP",80,100);
LetP.onRollOver=function () {
    att(LetP, "LetPi", 80, 0);
LetP.onRollOut=function () {
    att (0,"LetPj",80,0);
    removeMovieClip ("LetPi");
    setTimeout(remPj, 10000);
remPj=function() {
    removeMovieClip ("LetPj");
    LetP._alpha = 100;
When I set mouse over first MC ("LetP") it starts second MC ("LetPi"). When I remove mouse from this area, LetPi is replaced with LetPj, which disappear after a while revealing LetP.
Problem starts when I do this:
mouse over the mc, then mouse out, then over again, and then out
- result of this operation is that the LetPj appears where it should (that is x=80 and y=160), but it also appears in upper - left corner of the screen (x=0 and y=about 10,sometimes less).
And untill the additional mc (the one at x=0) disappear the main mcs (those at x=80) act chaotically on roll over/out events.
Is there a reason why it acts like this?

Answer 1

No
The example I geve was just for one letter, it was letter "P". That's why every mc in code I've written above has the same coordinates (x,y). I got other letters, every one of them works with the same mechanism as "P". But other letters have different coordinates. I want every letter to animate independently.
Every letter has 3 versions. For "P" it is "LetP", "LetPi" and "LetPj".
For example letter "R" has instances of "LetR", "LetRi" and "LetRj". Letter "O" has instances of "LetO", "LetOi" and "LetOj". And so on....with more letters.
I gave an example just for letter "P" so I'd know what to do with other letters
My first post in this thread was a function, which was supposed to work for all the letters. And it might've been not very understandable function (I have sometimes trouble with figuring it out  ) But it works as I intended to. Code in my second post is easier to understand, but it has the same effect as code in the first post.
Both versions of this code (my fist post, and my second post) works simmilar. But both of them have simmilar 'side effects' - instance of "LetPj" appears at the upper left corner of stege. And this side effect was not in my intentions
I was interested in the reason why this instance of "LetPj" (or "LetRj" or "LetOj"...and so on) appears where it shouldn't be.
Is that the explanation you were hoping for?