Is the Coloring Sheet for our Pre K-1 class off by one lesson?

No, that arrangement was intentional. The coloring sheet in each Pre K-1 lesson is a review coloring sheet, which is a picture from the previous lesson's flip chart. If you are wanting to print a coloring sheet to go with each lesson rather than as a review, you will have to go to the next lesson's "Come On In" resources to download the review coloring sheet.