Zjc
The ex thomson 767's have been in long haul config since the end of October, as they have been operating planned long haul. Thomson does not plan the use of scheduled long haul with short haul configured aircraft.
They predominantly work out of the scandanavian countries in the winter so are in a very slight different configuration with the back cabin having 8 more seats in it(1 row) but both the forward and middle cabins are the same as Thomson Airways long haul config.
Not sure why you think or who told you they are in short haul config.
Clipstone
The JAF aircraft is not the same as the ex-FCA configuration it doesn't have a large premium cabin at the front it's an all economy layout.