I meant that it is a similar mix to what a feudal lord's army will look like if he just has levies to work with. Without special buildings, a maxed castle gives 240 light infantry, 270 archers, 440 heavy infantry, 130 pikes, 315 light cavalry, and 35 heavy cavalry. That is a total of 1430 troops, so about 50% more than your basic unit. Looks like you are heavy on light infantry, pikes, heavy cavalry, and horse archers while being especially light on heavy infantry and archers. Unless you are getting really weird tactic rolls I wouldn't worry too much about the exact composition of your army.
I don't know the cut-off points for various tactics well enough to guess what range of tactics the army you are creating can use, but I'm pretty sure the answer is "yes" (which could lead to very swingy results). You probably want to check out
the wiki page on tactics while you are debugging this since what tactics do is not particularly clear in game.