Trigger on Next at different points

Hi, guys. It's me again with another simple question. I've created a group in CasparCG Client containing one flash template and several video files. Flash template contains a few stop points and I'd like different video files to be triggered at different points. I've tried to do it with "Trigger on next" option, but the videos that have this ticked are being triggered every time I click Next (F5), and I'd like them to be played only once. Do you have any advice for me? Thanks.