From what I can tell, it appears that everything in green is an extra voice (duh) that was created when you tried creating the first triplet. You entered it into the green voice, then deleted it and decided to instead put the notes in the left hand in purple and use the cross-stave option for those three notes, without deleting the original green voice. If you put those notes back down on the bass stave, delete the green voice, and then put the cross-staff notes back you should be fine. You can tell that the voice is complete because of the floating triplet bracket in the middle of the staves applying to the first three green rests.