I'm trying to understand something... I use IMAP email for my business. Across my devices (iMac, MBP, Android phone), I keep numerous identical folders for various projects. I routinely archive emails from my inbox into these folders. Email I no longer need gets deleted. For some time now, I've been noticing that messages I've filed or deleted keep returning to the inbox. If I actually open the folder I put them in, the little loading circle goes around and they stay put. Otherwise, they eventually reappear in my inbox. The weird thing is that when I access Mail on my Macbook and file messages into folders, they stay put without any fiddling. My settings are identical on both machines. I only have the one account in Mail. Any suggestions?