You are doing the right thing for Miley. Its interesting to read how Bengals can be as little as four generations away from having a wild ancestor. This explains a lot. It sounds like Ti was just trying to run Miley off of his territory - but as a house cat, she had no where to go. Also, we've been domesticating our feline friends for hundreds, if not thousands of generations. Its no wonder that one that is just a handful of generations from the wild would be so aggressive.

Finally, if this really settles the matter - how long until Ti would have turned on Juni? He sounds like a great cat - but not one for you or your Aby girls. Since his breeder sounds so flaky, I'm guessing that he probably didn't get the required extra-socialization that a bengal kitten would require to be a better pet.
Sounds like the best situation for him would be as an only cat or as a cat with a bengal "brother" or "sister".

I hope that he finds his right forever home and that you find peace for you, Miley, and Juni.