Anyway, as regards the leaflets, they're trying to make it look like people are voting for Sturgeon in some sort of presidential-style system, which obviously they aren't, and also that people are voting for Sturgeon for election as an MSP, when in fact they aren't doing that either.
It's the regional/list system that the vote 'Nicola Sturgeon for First Minister' is aimed at. But on that ballot paper people vote for a party (SNP, Labour, Tories, Alba, and other minnow/oddball parties that know they've no chance in the constituencies, so stand only in the regional/list system), not individuals. The parties put forward a list of candidates, ranked in order. So if they get two candidates via the list, their first and second ranked candidates get elected.
But thing is, it's nothing to do with Sturgeon herself. It's like there are mega-seats in Yorkshire, Leicestershire, Sussex or Tyneside etc, each returning eight MPs to Westminster. The Tories put forward a list of people who no one has ever heard of, and they say 'Vote Boris Johnson for Prime Minister'.
Problem stems from the fact that the regional/list ballot paper is supposed to be a list of parties, but the parties are allowed to put some sort of description on the ballot, so the SNP use 'Nicola Sturgeon for First Minister'. It's sloganeering, basically, and in the SNP's case simply intended to mislead