Hey there.. I'm trying to crochet a gingham blanket but doubling the size.. This is a pattern for a baby blanket with a finished size of 40X40. I'm trying to double the pattern... It says to chain 78...So I doubled it and chained 156...pattern repeats 11+1... However my gingham is not uniform which I'm assuming had something to do with my starting chain count? PLEASE ADVISE!! Thank you so much!