I think you have been lied to then, unless you own a points plan.
I just tried to book 7 nights at 12 months at my home resort, and my reservation window opens 2/17/21, which is 4 months. Between 12 and 8 months, you can only book at your home resort(s) in the season you own, unless maybe you own a points system.
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A side fun fact, well probably not if you own gold, is that the maintenance fees are the same for Gold and Platinum, or whatever.