Bird feeder

I created this one because the stock one, the stupid birds keep knocking it on the floor multiples times a day and the food is wasted. So in this ones is suposed to be 2 screw with a fast nut so i can remove it and place it again.
Supports only for the bolts. In my print the treads didnt print, just print a round bolt. But in fusion 360 the file has treads. Any ideas why this appened?