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human
[Dr Who] Plot Question

Please correct me if I'm wrong. This has been bothering me for days now.

Rory Williams, husband of Amelia Pond, also known as "the last centurion" or "the boy who waited" because he guarded the pandorica for 2000 years with Amy inside. He managed this because he is a plastic robot thing with Rorys memories. 

Yet... In the episode "asylum of the daleks" we learn that Amy kicked him out for his own good because he wanted babies and she can't have them because of something they did to her at Demons Run. Rory is still plastic.

In "the angels take Manhattan" we see Rory as an old man dying because the angels sent him through time. Rory who lived for over 2000 years BECAUSE HE'S PLASTIC.

Is it me? Have I missed something where he's not plastic anymore?! How can he suddenly get old and potentially have babies when he's a robot plastic man?
gpt
Rory isn't a fake plastic Auton at that point. He stopped being an Auton duplicate by the end of Big Bang Two, where the Doctor rebooted the universe, but 'ol Rory still retained all he memories of his plastic clone. He's all flesh and bone by that point.