Ordinarily, this wouldn't be a problem if the only election were the primary election. In this instance any independent showing up to vote would have to be asked which party primary they wanted to participate in. After all, if they want to vote at all it has to be in one of the party primaries.
However, here, with the non-partisan board of education election the independents showing up just get to vote in the board of election contest by touch-screen without necessarily realizing that they won't be able to vote in the presidential primary unless they affirmatively request a party ballot. Independents should be informed that they have to pick a party primary to participate in or else they'll only get to vote in the board of election contest.
I'm not certain that it is meant to confuse, but the SoS, who should be promoting meaningful participate in elections should simply require poll workers to ask independents if they want to participate in a party primary and, if so, which party.