Hi @Christopher Partridge,
If you can DM me both your DC file and your associated SPJ file in the Work Order used when you did the measurement, I can take a look and see if we're dealing with features or bugs.
And the "raw" distance measurements are not scaled, hence the raw designation.
What happens if instead of the DC file (or in addition to) you import the SPJ file into the project? The SPJ should be properly preserving the prism constants, however it might not have all the same network measurements that TBC understands.