Kasey:
It sounds like a spine problem, even though the previous owner said the bow liked those arrows. you may no be drawing them the same length, that effects the bows poundage, which would create a stiff spine situation. This is especially true if the bow is cut less than center, as your usuable spine range is narrower.
I totally dissagree with Ray, your peripheral vision should pick up the arrow shaft and it should lie in line with your point of aim, regardless of the style you shoot (gap or instinctive). Having to hold off target X amount will only confuse the issue as the amount will be different at different distances just like elevation changes as distance increases or decreases.
Find out how long the previous owners draw length is and then check yours, I would bet your draw is shorter.
Bob