"Acorns" in vertical tines are usually caused by damage to the growing antler. In essence, the velvet of the vertical tine was cut by a branch or briar. I've seen bucks with every vertical tine on one side with an acorn at the exact same height.
"Know where you stand, and stand there" --Jesuit Father Daniel Berrigan
"There is no reasoning someone out of a position he has not reasoned himself into." --Clive James