Janie- THANK YOU for that video! That's EXACTLY what happened to nearly every block on my Blooming Nine Patch! And while I was able to eventually "make it work," I can now see the why of "I cut these all correctly, why aren't they matching up??!!"
For the record, the Blooming Nine Patch pattern DOES instruct a scant 1/4" throughout.
That was hugely helpful! And...I liked that that 'scant' 1/4" was clearly shown in the beginning.