jquery jqModal Ajax和嵌套模式问题

I just started using jqModal as I need support for nested modals. I'm noticing some erratic behavior with nested modals and ajax, but I don't know exactly how to fix it. What happens is when I load the main modal, that has a nested modal in it, I get two jqmOverlay divs, it's like it's applying the overlay for both modals, even though the nested one hasn't been triggered yet. So when I close the modal, there's still one overlay being displayed. Here's the code:I just started using jqModal as I need support