What you mean bomber points? You mean bomber rank or bomber perks?
Scores for 101ABN show 45 bomber deaths.
You have 1 ar234 bomber death so I am guessing you mean perks. Any time you end flight and recieve any system message other than "You have landed Successfully" the plane will have been "lost". When ever you are in a Perk plane any system message other than "You have landed Successfully" will have meant you have lost your perk points for that plane.
You dont have to be "shot down" by an enemy to lose perk points. Any ditch, bail crash etc will cause you to lose those perks.
In the case of 234 any drone lost will cost you perk points. So losing three 234s (1 formation)will cost you 3 times their perked price.