I used pinnacle when I first started making videos and discovered lots and lots of bugs with it.
It is great for the average consumer just messing around with video editing but it is just unreliable for anyone wanting to do more than that. It didn't render like it should and freezes were common...Stay away from pinnacle if the video is anything important.
Adobe Premiere is a good one to use
Sony Vegas is probably a more Affordable option
-Cheers,
Chris
http://www.AutoBoofProductions.com