We may have some history in the game, but I don't remember much. Our BHs certainly are enemies after what was probably the worst divorce in this game, or at least on our map.
Anyway, I thought you were talking about production, not units strength. It makes every sense to keep your overall or even individual units' strength hidden, regardless of mods' affiliation, because the mods are not the only ones reading forum posts... I hope.
Now, your problem... I think you misunderstood this:
The "2%" is not the bonus increase compared to the previous level, as you think (if I understood you right). Instead, it is the total bonus.
In other words, level 25 gives 2% bonus, level 26 gives 2% bonus (not 4%), level 27 also gives the same (not 6%), etc. This is the same as production: level 26 gives 1000 p/h, not "whatever level 25 gives plus 1000 p/h".
So, at level 30, you will have only 5% bonus, not 15% (which would be 2+2+2+2+2+5).
I hope this makes sense and answers your question.