Had some of the same stuff go on with mine
What was happing the case was going up at a slight angle it didn’t meet the die squarely and cocked a little . It seemed to be the case to me . So I took a flux brush and bent it so I could Zip tie it to the part of the casting that the case feeder would be used and adjusted to brush the case into the case holder .
Works great then I put some case sizing wax on the brush it works even better if you want I can send pic I don’t explain well