does it really matter? the whole point of a related text is to support your core texts and give a better understanding of belonging.
that said, they will definitely not mark up people who wrote two. i'm pretty sure on the whole they'll be looking a lot at how well you answered the question more than how many relateds you chose to do. and yes i understand that the ONE related thing was part of the question but, for those saying "it didn't say at least one", nor did it say "ONLY one". you're saying it was in bold and capitalised, but i checked last years paper and it's "at least ONE" in bold and capitals as well. i.e. it wasn't in bold and capitals to make us aware it's ONLY one this time. it was just capitalised like it is EVERY other year.
that said, they will definitely not mark up people who wrote two. i'm pretty sure on the whole they'll be looking a lot at how well you answered the question more than how many relateds you chose to do. and yes i understand that the ONE related thing was part of the question but, for those saying "it didn't say at least one", nor did it say "ONLY one". you're saying it was in bold and capitalised, but i checked last years paper and it's "at least ONE" in bold and capitals as well. i.e. it wasn't in bold and capitals to make us aware it's ONLY one this time. it was just capitalised like it is EVERY other year.