from your pictures above, to me it looks like you have the incorrect style of drop targets installed - those appear to be the "hooded" type (which are for in-line drop targets where the ball has to roll over the target when its in the down position) when you really just need to use the "tombstone" style which are skinnier/thinner and will fix you right up!
and for all others with similar problems ..... one thing of note when replacing original drop targets with new ones is that many times the new ones have a slight curve to them where the originals were completely straight, they should be straight / flat
if yours are curved they can be straightened by heating and bending them - i have done this by dipping the curved ones in boiling water bend straight & drop in cold water
not saying this is your problem (you have wrong style of drop installed), just saying i have seen it in almost every instance of new target replacement
for all others to trouble shoot this problem you would pull the rubber rings behind the targets off and see if your drops fall correctly, if not, then loosen the drop assembly and see if it will slide forward and try again