When you say you got the bow "tuned" - did they put it in a jig and check the centershot and nocking point? From there, did they or you check the paper tune? And, from there, did someone shoot groups with both field points and broadhead - tweaking the nocking point and arrow rest to get the two groups to come together? This is process I have used with success a number of times. It is outlined in detail in Easton's Tuning Guide.