Adding too much ammonia doesn't grow the wrong type of bacteria, it just doesn't grow the ammonia eating bacteria since the bacteria is eventually effected by the toxicity. This stalls the cycle since ammonia cannot get broken down into nitrite. Bacteria grows just about everywhere. Lots of different types of bacteria grow in your tank besides Nitrosomonas and Nitrobacter its just that they are not of concern to us. So I don't agree with saying "you grow the wrong kind of bacteria" you simply don't grow the kind you want.
All of that is wrong Mikaila.
Adding too much ammonia encourages the establishment of the wrong type of bacteria because the bacteria we want in our tank work at levels of less than 0.01ppm ammonia (i.e. less than our test kits can measure). This is why you will often hear of people having a mini-cycle a week or two after they think the tank has cycled as the 'wrong' bacteria die off and the right bacteria take over.
Also the high ammonia is inhibitory to the nitratation bacteria (i.e. those that convert nitrite to nitrate).
Nitrosomonas and nitrobacter are not the bacteria we have in our cycled aquarium (in any number). They are the bacteria that will grow by allowing excessive ammonia and nitrite levels however (i.e. they are the 'wrong' bacteria).