Do i have a thinking abnormality?

My friends say I am a freak for thinking the way i do. I number things and group everything i do. Like for my name A A R O N i always think 1 1 18 16 15 and for my months (grouping) i think of them like Jan-June are in the middle, July is alone to the side but a little bellow it August- November are at the om and December is at the very top... And one more thing, i use colors to organize things like numbers into groups 1=red 2=blue 3=green 4=yellow 5=red 6=red. and so on for whatever number. if i am a freak can you tell me what i have wrong with me?