all the advise is right on imo
you are shooting to far away for yer bow. inside 20 yards there isnt anytime to "jump the string"
usually they duck the shot vs jumping over it. you see them jump and figure they jumped it. but as mentioned, the sound makes em tense up and they "duck" to get ready to jump...evolution? who knows.
quiet that bow up.
sit in a quiet room, blindfolded...load and draw yer bow back...any sound is a tell tell sign for deer to GTFO, especially big deer who have been around.
now shoot the bow, blindfolded? not necessarily, but if yer comfortable at whats in front of you go for it. if not, take the blindfold off, aim, close yer eyes...the key here is to listen....the pop, vibration....the boi-oing...record it if ya can. replay and stereo helps alot.
string and limb dampeners. i dont think you can have to many. i like felt between the strings, helps alot. gl