Cloth over cloth + that damn button tool

[immaturemonk]

Hi..

First question:

how can i have good performance with one cloth over another.. lets just say two planes over each other... all i get is vertex jiggles.. what options should i change to imporove this?

thx

Second question:

everytime i try to apply a button on a cloth, it tells me

"Error: Cloth was recently disconnected. Playback, then retry making a button."

it doesnt matter what i do.. i start with a new scene, make cloth, grab a geometry, then the cloth and apply the button option.. same result everytime..

what am i doing wrong?

EDIT:

Third question:

i have a cloth surface modeled with an exterior and an interior surface... but the problem is whenever i'm running a cloth simulation, the inside of the cloth plane cuts through the exterior...meaning it doesnt stay parallel to the exterior.. hmm.. i'm not sure if i'm making sense...................

thanks

-Monk