Start the adjustment procedure from scratch. Disconnect the shift cable and set the outer derailleur travel stop so the chain will shift cleanly to the smallest cog with out spilling the chain outside. Shift the derailleur by hand and set the inner travel stop until it will shift to the 25 cleanly but doesn't throw the chain into the spokes.
Then shift the brifter to the "most relaxed" position (i.e. push the thumb lever multiple times until it stops.). Connect the cable and pull all the slack out. Then adjust the adjustment thimble until the smalles to second cog shift is clean both ways. Then it should shift the entire cassette properly.