If I'm not mistaken, I think the way it works is all avatars added/edited after the change will be affected. Avatars set before your changes won't be affected. More likely you'll need to adjust it manually by editing your templates to force the width and height settings. There may be a query you can do but I don't know it.
In your postbit or postbit legacy find and change:
Code:
$post[avwidth] $post[avheight]
To:
Code:
width="130px" height="130px"