Hi
Agreed your first link this seems to look like my timeline image and shows .13.08 min. However I am a bit puzzled to note there are no thumbnails visible along the timeline and that the overlays are also blank apart from the last one even though the export is in progress. (compare with my image). Also In your original download there were several clips on the timeline but here I only see 1.I assume that this is different. If you still have the .vpj file you uploaded originally and the component files what do you get with that. Of course that still doesn't explain why an apparently normal timeline won't export correctly.
I am not sure where the second image originates from but it does indicate a 40min duration.
It's very odd that adding an overlay causes the complete clip to play again in the export.when only a segment is shown on the timeline and more so when it exports OK here .
Can't explain this currently.
Since you posted regarding this problem there has been another post reporting something similar....
http://nch.invisionzone.com/topic/26712-unable-to-export-sequence/
and looking around another post...
http://nch.invisionzone.com/topic/26678-how-to-export-a-small-fragment-of-larger-clip/
I have notified NCH and am hoping they come in on this asking for some some details.They may want something like the .vpj file of the faulty project and version details etc.
Nat