On Mon, Jun 22, 2015 at 8:32 PM, Jean-Paul Kogelman <jeanpaulkogelman@me.com> wrote:

Since it's possible that block timestamps aren't chronological in order, what would happen if a block following a size increase trigger is back in the past before the size increase? Would that block have a lower size restriction again? Would using block height not be a more stable number to work with?

The activation or not rule is purely timestamp based. Blocks with a timestamp less than 1452470400 have a limit of 1MB. There could be an 8MB block followed by a block that is limited to 1MB.