AI power

Ok so i have been noticing some issues while playing. I am invading canada and defending a province i had conquered.

Canada (AI) had 2 tanks level3 in my province with 2 level 3 interceptors over their tanks patrolling.

I had 1 commando 57% 2 top level tank 100%.

I moved my troops under the interceptor umbrella after a while my tank went down to 55% and commando dropped to 18%. His 2 interceptors dropped to 95% This was just from interceptor damage since i did not engage the tanks. Eventually i got a anti aircraft underneath it and destroyed his planes.

I then put my 2 top level interceptors (55%) over his tanks thinking i would do the same damage. After a while his tanks dropped to 95% and i lost 1 inteceptor and my 2nd went to 88%. To me something seemed weird.

Just now On my province land

Canada (AI) has 1 lvl3 tank 1 lvl3 infantry at 100%

I have 2 tactical bombers Lvl6 at 55%

I attacked, his tank is still 100% his infantry dropped to 67%

I lost 1 tactical bomber and my remaining bomber is now at 88%.

How does that work. his 2 armies together can hit me at 2 hit pts, while my tactical bombers hit infantry at 11 pts and armor at 6.1 pts. Something doesnt seem right on this.