Unaccounted Variable

Date- 1 April 2321

Time- 15:23

Location- Sky Blossom City, Guild Association Mall, Warehouse no.234

I spent the last three hours arranging all the arrays of the advanced array formation, then the intermediate and the basic array formation. It has been hectic the last few hours for Susan procuring ingredients at my wimp. She didn't complain, and she earned my appreciation for that. I know I could always count on her. 

Why did I spend the last three hours rearranging the basic, intermediate and advanced formations? How did I achieve it in mere three hours? 

It only took me three hours to arrange all the arrays because I had arranged them before and kept the array cores I used to arrange those arrays. Since I had the array cores ready, it took little effort and calculation to rearrange them. But during this process, I unearthed a variable that I didn't consider earlier.