(did I happen to mention, this happened to me...) but thankfully I only made one and then figured out which way to turn my block so that my little birdies and trees would be right side up in my quilt.
The method I am using to make my hourglasses is drawing a line from corner to corner and sewing a 1/4" down each side of the pencil line, cutting it apart, and repeating the process. I'm not pre-cutting triangles in this method.
Take one block (birdies) and with them right side up turn them to the right one time so they are sideways. Leave the other print (trees) right side up. (I do apologize for fuzzy photos...ipod pics are sometimes not the best.)