Articulate Storyline Cue Points

Hi. I've been developing a course with screens containing tons of imagery and bullet points that I align to various cuepoints I've inserted while listening to the audio. My process is to sync bullets and imagery with text-to-speech, and then I replace text to speech with professional voice overs. I then have to realign bullets with new audio files.

Question 1: Why can't I always delete a single cue point? Sometimes the option is offered, but other times it is not.

Question 2: Deleting all the cue points shouldn't affect the position of imagery and bulleted text in the timeline, correct?

Thank you,

Michele