What are the differences between these levels of study? I'm Brazilian and am currently trying to apply to this scholarship in New Zealand. However, when asked which "level of study" I will apply for, I see the following list: 


PhD 
Masters course 
Masters thesis 
Post-Graduate Diploma 
Post-Graduate Certificate 


I only understand what a PhD is. To me, both masters sound like the same thing (in Brazil we have a masters course that you conclude when you present the thesis), and I haven't the faintest idea of what is the difference between a post-graduate diploma and a certificate. 

So what's the difference between these four categories and are they known as such throughout every English speaking country or are they specific terms used only in NZ? 

(also I'm not sure which tags to use here, so correct me if necessary)
A Phd is a three or four year degree awarded following research and a thesis.
A Masters course is a taught postgraduate degree usually of one or two years duration.
A Masters thesis is a research degree of one or two years duration awarded following research and a thesis.
A Post-Graduate Diploma is usually two-thirds of a taught masters and is awarded to someone who did the examination component but did not complete a dissertation.
A Post-graduate Certificate is usually one-third of a taught masters and is awarded to someone who left after completing half of the course credits.


These terms would be used in areas based on the British University system, but all have analogues in the Bologna Process.