Why didn't my cheesecake bites come out right?
My immediate response would be that an hour for cheesecake bites seems to be way to long. The smaller your baked goods are, the faster they bake. I
I would lower the baking temperature slightly and reduce the time by at least half and test fro there. 

If they are baked as a pan and cut, then the oven itself might be running hot, and you may want to check if it is accurate. Again try baking at a lower temp, cheesecake does well at lower temperatures. Could even try baking them in a water bath to keep them from getting to hot. 

As to it not being sweet enough, the simple fix is to increase the sugar.