You're not a bad catmom.

When they chase and pounce (ooopps, originally typed "Pouncer" LOL) its more than likely play. As they continue, it'll become more and more play. They should start grooming each other, etc. But that takes time, lots of it.

As for the howling, from what I've heard, Bengals are known for that. My Abby does it (though she's not a Bengal). I find it endearing because she only does it for me. She'll start crying and crying... and usually all I say is "what Abby?" even if I'm in the other room. She always hears me and will howl more, making me come get her, or howl as she comes running into the other room for me. She finds me, seems content and stops howling. Sooooo... we need to discover what he's howling for. Do you ever talk to the previous family? Can you ask them if he had a favorite toy, favorite bed? Is he missing a nightly ritual of a certain treat? It could be ANYTHING!