Roto Clone Issue

#1

Hey guys.

I’m kinda new in Nuke and I have an issue.
In my video, I’ve clean the post (you can see it in the first track point) but there is a problem: a swimmer appears from nowhere. To resolve this, I think Clone tool is the best, I clone him at frame 23 (where he appears entirely), and I would like to use this between frame 1-23. I though TimeOffset in RotoPaint properties was the solution, but nothing change with it.
Here is a picture to help you understand:

Thanks for your help, and excuse english skill…

#2

You will not get an answer because our English are/is also
bad and we cannot understand what you are trying to achieve.
All i can say is that clone tool is not the best for sure.