Brazos...to reply to your post about spine,
you indicated what the bow weight was at 28" (have you verified this?) and what the arrows were bop. However, nowhere do I read what your actual draw length is when shooting, not drawing in front of a mirror or friend, and what the actual bow weight is at that draw. That is the critical part. Only then can correct arrow spine be evaluated.
I just got back from the North American Longbow Safari.....longbows of every shape and size where there. Got to shoot with Bob Burton and talk Hill stuff which was neat....
however, I watched alot of shooters, and the majority have arrows sticking out many inches in front of their bows. The nice fellow I shot with for two days chided my shooting companion for having arrows too short...(he was drawing the broadhead 1/2" from the back of the bow) while the "chider" told me his bow was 58# @ 28", he had arrows 29" bop and when he shot there was at least 4" of arrow sticking out....to me that means his draw was about 25", his bow weight around 52# and his arrows were severly underspined. He had the typical arrow wobble if his form wasn't absolutely perfect. This scenario is extremely typical of trad shooters today. no wonder people can't get wood arrows to shoot well.