Rendering problem with Sony Vegas 9

I am fairly new with Sony Vegas, and the one problem I seem to be encountering is that every time I render a project, the finished video would pick up one extra frame at the end of my edited frames for some reason.

(Preview on obviously) I went back to the project version, and I checked out the end of each next frame to make sure I didn’t overlook that last footage of frame that I didn’t want, strangley enough, I don’t see anything wrong during the preview, but only after I rendering it into a video format, I would notice that there was 1 additional noticable frame after each cut.

Umm, I hope this didn’t sound confusing too anyone, but if you understood my question, can you please help me out? Much appreciated