Try Claystone's sliders in the slider thread, I use those with the modification of 75 RBA, 60 R Blocking, FG acc 30 and kickoff power 30. Having trouble running with a new team is normal, your line and rb has to learn all the plays to run the effectively.
As far as your other question I'm a little confused, Are they not learning the plays? Did you just join the team and have not tried using the plays to teach them? I would think just going into the playbook section and deleting them should work. On my current KC team I went in and delete all the counter plays so my OC would stop calling them on 3rd and long.......