first off, you guys are playing with a way out of date map (and maybe out of date triplea versions too?)
The current version of the map is version 3.3
your version is 2.8
there are various bugs in the 2.8 version
Also, in the 2.8 version there were various things that were not completed yet.
For example, in 2.8 and previous versions Tactical Bombers could bomb Factories. However, just because triplea does not stop you, does not mean you have a license to go against the rules.
I specifically wrote this in the game notes: That playing this map on TripleA does not absolve you from knowing the rules of how to play the game.
Just like when playing the board game in real life, there is nothing stopping you from using tactical bombers (or any other unit) from making strategic bombing raids. It is up to you to know the rules and play by them.
For the question of how does bombing work on TripleA, here are the steps in their exact order:
Bombers will each roll a 1-6 sided die.
This Dice result will get mailed to you from MARTI. (therefore the dice results you see will be 1-6 in natura)
AFTER Receiving the dice results, TripleA will add “2” to the result for all Bombers (tactical bombers do not get any bonus), and that is the result you will see inside TripleA.
I do not have your dice results, and I can not recreate the situation because I am using a newer version of the map.
However, I can confirm that at least when using TripleA 1.6.1.2 and Global 1940 version 3.3, that it plays exactly by the rules.
I suggest you update your map, and play all future games using that updated map. You can also (after updating) do some quick tests by yourself to confirm this:
1. Start a new game (PBEM or Local, you should try this in both)
2. Use edit mode to give Germany 99 Bombers, and use edit mode to delete the fighters in France or UK (so you won’t get asked about scrambling)
3. Bomb france or UK with all 99 Bombers
4. Watch the dice results, and compare them with the dice shown in TripleA.
(you will see the dice results as: 1, 3, 6, 4, 2, 5, etc. And the dice in TripleA will be exactly 2 higher: 3, 5, 8, 6, 4, 7 )