@Jamie ********
At least in theory, when your current stamp runs out you would go on amnesty (until no longer than the 31st of July) and then just before that expires you could apply for the 60 day extension and get it.
BUT some offices are saying you can't get any extensions once you go on amnesty and some are saying you can. So it's pretty much up to your immigration office.
It sure would have been better to GO to the immigration office before your current stamp expired and ask about it rather than after the fact once you're already on amnesty but you burned that bridge already.
At the very worst you'll be able to stay until amnesty runs out and then follow what ever the government tells amnesty holders to do once that happens.