When Snape is answering Bellatrix’s questions (which also serve as a convenient plot device to explain why Voldemort trusts Snape), he says this about how much Dumbledore trusts him:
“Not quite,” said Snape calmly. “He wouldn’t give me the Defense Against the Dark Arts job, you know. Seemed to think it might, ah, bring about a relapse… tempt me into my old ways.”
So basically, he’s saying, that Dumbledore thinks letting Snape teach DADA would revert him back to a DE, but he doesn't think sending Snape back to Voldemort as a spy would as well?
Am I the only person who thinks that Bellatrix not immediately bringing this up is uncharacteristic of her?