Sarcasm is an adjusted stress reaction.

Ah! You can do the breaking off little clips things in Kdenlive, it's just stupidly not explained clearly. You have to choose in and out points in the clip monitor, then physically click on the video in the clip monitor and drag it down to the timeline. Which...why would anyone know to do that? It's like they put in a shortcut but no actual dedicated button. But yes you can do it - http://www.kdenlive.org/user-manual/quickstart-guide/first-project/dragging-clips-timeline

(I use Cinelerra because I like the advanced features, but yeah, it's a helluva learning curve and not that stable, and Kdenlive actually has an active development community so it'll probably get there eventually.)

Pitivi is still in super early mode and I've never tried Blender. I had similar export problems with OpenShot.

Anyway, um, thread-hijacking out! ;)