Exploring the issue:
Corona's Camera Scale value seems
incorrect, but is just different: e.g if Cycles Ortho Scale is is 10 then Corona's Scale is 5 - Views don't match yet resulting renders do?! Values are inter-connected but don't work correctly for the viewport (Corona VS Cycles Scale = 1 : 2).
Shifting Corona's Ortho Camera on X or Y has no influence/effect. Does nothing. Resulting image stays same as without Shift.
On Perspective Camera is OK.
IIRC there were issues with Corona's Ortho camera in the past. Am not sure.
PS
An alternative to bypass this is to use Perspective Camera in extreme
Telephoto mode.
Set it further away (cc200m) then set extra high Focal Length (80,000,000.0 mm) and Sensor Width (8,000,000.0)
Note: there's still minutely visible perspective, to correct more go even further away and set Focal Length accordingly.
Also note that at some point precision will become a problem and will create other erroneous results.
eg. Perspective Camera (as described above)