No Worries mate, I have also been guilty myself in the past of skimming over things, seeing what I thought I saw and jumping to the wrong conclusion.
It is know as the "MANURE" Principal for a reason hunMAN natURE
Remember the Old Adage "Measure Twice, Cut Once?" and old Carpentry term , it also applies to the written and /or spoken work as well as a length of wood.
The difference between AND 'n' OR can make or break contractual disputes as I have found out over the course of my career, supposed to be an Engineer yet a lot of my time is spent all over the contracts with a Magnifying Glass AKA Sherlock Holmes ... hehe keeps the wolf from the door and rice in the bowl, plus I don't need an excuse to be an objectionable cunt so being paid to be so is a bonus.
As Tina Weymouth once sung about WORDS