GeneDavis

We've been down this road with this exact plan.  
 

Uncheck "retain all framing" for those walls, in the structure tab.  You must have checked that box before trying to frame.
 
All frame fine when that is done.

Blocking CAD objects creates a new object, let's call it the "block," and the block can have its layer different from the layer or layers of those elements which were blocked.  Think of those layers as now subverted or made moot.  You now control visibility of the entire grouped blocked thing, the block, by its layer.  
 
You gotta explode it to regain viz control of the elements, which when unblocked, now retain their original layer assignments.

One door, options tab, 2 panels right, two panels left, looks like what you want.

Cannot remember whether X10 had structural member reporting.  Do you see it in the defaults:  Tools > Materials List > Structural Member Reporting?
 
You have to set this up (if it is there in X10) to get framing to report piece counts in your specified lengths. 

It's not that intuitive, but you can set up your file using a framing defaults and wall specs, plus material list to do the "buy list" reporting, and get pieced framing like what one does at build time.  By that I mean mudsills, wall plates, and deck rims modeled and reported in the material list in your specified max lengths.
 
If for example you have set your wall plate max at 16 feet, the count is going to give you, for a 17 foot wall, one 16 foot piece, and one one foot piece, and it is tallying the one foot piece with other shorties from elsewhere in the build, to cut from 16 foot pieces.
 
What Chief does not do, but what a framer does, is cut the 16 footer back to the nearest stud or joist center, so the butt joint falls on a member.  Chief will put the joint wherever 16/0 falls.
 
As others have said here, there is no such way to piece rafters with a bearing line dialog, as there is for floors.  There is no way to specify a max length for fascia or subfascia or ridge members, either.  They will build at full length and report to the material list in lineal feet.

Use solids to make your truss and put it wherever you want.  A floor truss can only be put in a floor envelope.  What you want is a truss as a drop beam, something Chief does not do.
 
If it is not important you see it in 3D (will 3D views be in your con docs?), just do a beam the size of the truss, and label it as TRUSS in your structural plan views.  You can use CAD to show something in section view.

I made a 3D solid to do this.  You can rotate framing in a wall layer that is framing and built with its studs and plates, but you cannot rotate general framing objects.

I've done it making two roofs:  The gable overhang has open soffits, the one starting at the building line does.  Not pretty in plan view, but does the trick in 3D.

I belong to a club of about a thousand members.  At any event or meeting, we all wear our name tag badges around our necks on nice logo (it's a car club) lanyards.  It is a great big group, much larger than my Rotary club meet, which is nametags also.  It is simple courtesy to wear the tags and badges, even though most of us know most all the members.
 
It is a courtesy here to do the same thing.  Your sig which gives very important information relating to software version and hardware on which it runs is essential to knowing how to respond to a question or problem or issue.
 
So be courteous.
 
Attached is a view of a plan with valleys in the roofscape.  I pulled back the planes at one of the valleys, six inches exactly.  I could make a copy of the building right alongside this one, auto roof it, edit the roofs away to leave just two 6" valley planes (the "valley patch"), retexture them as galvanized steel, and then copy and paste this into the roof with the gap valley.
 
So this was a courtesy, and we'd like to see you back sometime, all badged up.

It's a toggle, and you might want to add the three buttons to your toolbar, as most need to swap and change depending on situation, and it's too tedious to make the change going to Edit>Preferences>Marquee Selection . . . 
 
See the attached for all three added to the toolbar:  Contained, Intersected, and Centers.

Solved!  Deleted the window in layout and ran it again, and it's OK and with cornerboards.

Here is just one of the training videos Chief has on this topic.
 
https://www.chiefarchitect.com/videos/watch/30/cost-estimating-using-structural-member-reporting.html?playlist=104

Or as you probably know, control the placement by casing width, using the wide casing that locates your jammed door correctly, then select all doors placed thusly, and change their casing widths.
 
Chief does not have an auto-placement feature such as what you may want, but you can go on the Suggestions forum and make your case.

A curved ceiling plane would make the surface, but then you would have to deal with the vertical surface and its bottom shape.  So, to do it best and quickly, just model the center and the flanking rectilinear soffits as one polyline solid. 

Try making your furred studwall your main layer.