Move Monthly Data (January, February) into New Columns

Actually, I am still struggling getting the formula to work correctly. I am trying to create the template that I referenced, and the array formula seems to be working incorrectly (at least how I have it written). Would you be able to tell me what I am doing wrong?

Ideally, I will be able to create this template so that I can just drop in up to 36 months of data and it will convert the data into "Month 1, Month 2" etc, for me.

Thanks!