Rules not refreshing.

I’m trying to edit one of my meta boxes to appear only under a specific custom post type and taxonomy, but every time I add the rules and click “Update”, it just refreshes with the only rule being “Post Type” = “post”.

Is anyone else having this issue? I have about 8 other custom field groups that aren’t suffering from this issue, so I’m really lost as to why it’s happening…

http://ww.wp.xz.cn/extend/plugins/advanced-custom-fields/