[Silvermarten]

Originally Posted by Sargeant_C

This jumping and attacking the leash is going on for too long now. After I do make him sit, he gets a treat for listening. But when I cannot walk ten steps with him this is getting out of hand.

I've got a goofy dog too . They are much too smart .
Sounds like he *may* have a chained behaviour going on in that he thinks 'jump, bite leash , sit , = yummy treat ' . It doesn't take much for them to learn a behaviour chain ( darn smart dogs ! ) .
As you cann't walk 10 steps back things up and walk 8 steps ( or less) have him sit and reward him . Reward the little success's and you'll be able to build on it . Also if you don't already as he's a big energetic guy that clearly wants to play , use that as a reward too . Short play sessions can be mixed in as rewards instead of constant treat rewards . But as he's excitable , keep the play calm while he learns control . It's helped my dog tremedously . He is starting to turn that excited attitude towards focusing on me and working longer with a very 'up' attitude . It takes a lot of time and patience .
What type of collar are you using for training ? Sounds like a properly fitting prong collar would be a good choice .
Just my thoughts