Originally Posted by upnover
The bit should ALWAYS be over his tongue.
It's difficult to know what exactly is going on even with pictures but I'm thinking that your horse is very very green. Playing with the bit, not going forward when asked, and not turning on a direct rein can individually mean different things, but collectively makes me think that he's barely broke.
Being green may be the case but any horse who is ridden with the bit under his tongue and an improperly adjusted saddle is not going to move if possible. There is too much pain involved in moving. I think you are right about him being green but we can't know until the other factors are eliminated.
Goodness gracious, if any of my horses were ridden like that and then whiped if they didn't move, they would mostly try to kill me. That is one forgiving and tolerant horse.