Toned monochrome question

Hi there, long time photographer first time zine maker! I'm putting together a zine of very nearly all monochrome work. Much of it is warm tone black and white. Within the document there are some images at full monochrome, some at 33% sepia and some at 44% sepia, and a single spread in colour.

Only on one page is there a mix of these tones, on the others both pages are the same tone or a spread.

Couple of questions, anyone think that sounds unprofessional (particularly the page with two warm tone variations, are purchasers more likely to think this is an error) and second, this is going to be printed on an Indigo, what are people's experiences with colour casts and toned monochrome vs pure monochrome.

Cheers