Originally Posted by
henry999
It matters simply because it is one more indication that the calculator can't be considered accurate or reliable. Not to dream, of course, that BA would ever think of trying to fix it. Heaven forfend, after the recent / current BAEC nightmare.

Well in this case it is correct for your HEL-ORD-HEL
You can work it out yourself if you wish, take the mileage, apply the selling class bonus, apply the status bonus.
HEL-ORD one way in I class on BA code as a BA gold
Base miles 4436
Selling class bonus 150% - add 2218
Status bonus 100% - add 4436
-----------------------------------
11,090
If you want another place to check the owenrudge calculator is a useful calculator albeit the underlying mileages don't quite match the ones BA uses so the end result may be a few miles different
https://www.owenrudge.net/utils/bacalc/
In terms of removing non existent routes from the calculator, I doubt BA will want to spend any time doing that - after all why would you be looking at routes which don't exist and what does it matter if they are left on the database.