Looks like you use Videocharge (not Watermark Master).
You should enter into Editor and set timeline without unnecessary frames.
(also be sure that you have set Output Mode = Single)
I'm not angry, but I'm not happy with VideoCharge Full that I purchased.
The editor is not cutting the frames properly. I set the marker to highlight/delete from 00:00:12.50 through 00:00:29.48, but it didn't do that. Instead, the program cut 00:00:10.00 (about) through 00:00:19.00 and then played for a second and then cut 00:00:20.00 through 00:00:29.48.