Biting is one of the easiest problems to fix. They all "try it on" - for sure. But, they need to learn that it's not acceptable for mummy, and usually they do that and just get on with the process of feeding. You are on the right track. Tell her no, that it hurts you. If she persists, put her down and walk away. There will be tears, but she'll learn.
The acrobatics? Welcome to the world of feeding a toddler! So much to do, so much to see, so many positions to feed in. But, anything that hurts you - tell her "no" - firmly.