We are working on rolling out Jive for the first time and keep running into this issue. I feel like this has been introduced since the 2016.3 release. Please advise.
From your description "update the tile title for a carousel the title reverts back to "CAROUSEL" after publishing page" this is inline with the issue being tracked as CLOUD-1252, which is currently in an open/unresolved status. As such, I would recommend submitting a case in your customer group here in the Jive Community where a member of our support team can link it to your account and provide updates on its status.