Hmm. I justed tested the same (new field group, no fields with content area turned off) and it worked as expected. I only tried it with a specific post (as well as a specific page) and I don’t have 2014 installed so perhaps not a 1:1 comparison.
Do you have any other field groups assigned to those pages. If so, they may be over riding the settings for your newest group.
If multiple field groups appear on an edit screen, the first field group's options will be used. (the one with the lowest order number)
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