Beware of spitfire broadheads

Until this year I swore by shooting these broadheads. Last week I shoot at a deer and I estimated the distance wrong and shoot right under the chest, a clean miss. When I got my arrow out the mud I thought it was odd that blades didn't open. Well Friday I shoot a big doe at about 20 yards and drill her right behind shoulder. I go pick up my arrow and almost no blood and one piece of hair, I mean just a few drops of blood and arrow was buried in mud so it had to be a clean pass through. Well blades didn't open again and yes was a different broadhead. I trailed her for over a half mile accross three drained crawfish ponds. At times she bleed alot and it was easy trail to follow then nothing. I rode around after trail was lost on top of tractor while my uncle drove it just randomly searching ponds but no luck. I hate killing an animal and losing it. All the blades seemed too tight to me, I had bought two 3 packs and they all feel too tight except one of them.