I don't find it odd at all, all my family do the same! Mind you, I sometimes compensate by spreading it extra thickly! 
An odd thing my grandmother used to do was hang up used tea bags to dry before re-using them! Perhaps thrifty rather than odd, but it seemed so to me as a child.
One of my many strange habits is to always arrange my food on its plate in the same order. Protein at 8 o'clock, carbs (or these days carb substitute) at 12 and vegetables at 4.
When eating something on toast I have a special way of cutting it neatly into rectangles. To cut across the corner first would be so wrong! I do not have OCD, honestly!