It got our attention, you're just so far south that most of us are still a long way from the burr stage, even.
Technically, you only get 1 flush of cones. So in theory, you should only have a single harvest season...but that's theory. In reality, the cones aren't all ready at the same time. Usually ones near the top mature first, so you can just pick the ripe ones and come back later for the rest.
You shouldn't get a second set of burrs (cones) on the same plant unless you really over fertilized them. Then the bines will sometimes do goofy things but those cones usually aren't any good.