Huh? I don't really understand what you are trying to do. What do you mean by "trying to make 3 second selects"? Are you trying to make 3 second clips from a long master clip and put them in the timeline?
"I always need to resent (sic) the clip time for each new select" I have no idea what this means other than I think you meant to write "resend" instead of "resent", but even if that's true the sentence still doesn't make sense to me.
Perhaps if you try to explain it differently and more encompassing (such as what you're cutting and how you're going about it), then maybe I can figure out what the problem is.
Andy