lol... been there... bought the T-shirt. Then 'upgraded' to another! It's so easy to mis-read the instructions on patterns, books, magazines and stuff - cause folks tend to notate their instructions differently.
Not to worry, it will happen again. lol. Great job in figuring out a way to salvage/use the remainders of your cuts. That can be fun too.
oh... I created a Thanksgiving 'harvest' theme wall quilt out of the last er... 'misread' that I did. Looks smashing, like I set OUT to make that darn thing in the first place! <smile>