Hi,
I might be wrong about this, but.....
First, to disable it, just click again on the feature and make sure that there is no "ticket".
Now, when you are in debug mode and runing on the "main" page of your method, then it always stop at exceptions. This is because it is the end of the flow, UNLESS you have a "recover/resume" to continue.
I think that what this feature does if its enabled, is to stop on Exception in sub pages (when you call a page from other page).
Regards,