There are quite a few irrelevant data sets in the ISO mode for functions/ parameters that MG Rover did not implement on MEMS 3 - like ambient temperature, fuel temperature etc. Therefore, the numbers for these are largely spurious.
There is little spurious data in the BMW proprietary mode - although the inlet cam position data is irrelevant for non-VVC engines (hence the "?"). But not sure why there are still ambient temperature and fuel temperature outputs? Unless this is an error, or this is a hang-over from the ECU's original development??? Perhaps Philip can comment?
The data probably provides a starting point for knowing what normal values might be - although whether this car has a problem or not I don't know! LOL It runs very well, and there are no reported errors, so hopefully all is well.
I can get the same data from an MGZS 120, and in the future from a MGZR 105 (MEMS3).
I can also obtain MEMS1.9 data from my two MGFs

The data you get from MEMS1.9 will be interesting to compare as it is quite an interesting ECU (as the fuel/ignition adaption post shows)