[Elecraft] something is bugging me, K2 keying problem.

[Jack Regan]

The problem of the dashes following the dots sounds like the iambic mode B is set.  This mode sends the opposite element if contact with the first element is held for a certain time. To send only the one element, the key/paddle must be released before that time threshold.
   
  Iambic A, sends alternating elements if the paddles are squeased with a fifo, lilo pattern.
   
  Jack Regan