View calibration factors ?

[ouzel]

Hi All, I'm using the Tacx Vortex, with the Tacx Training android app. Everything is the latest version.
I seem to be having trouble with calibration stability. For example, I ride for 10 mins then use the app's calibration facility fine. I the do a training session, recording 50 kmh at 210 W as part of that. At the end of the session (with me and everything else still warmed up), I recalibrate again using the app, and do some more training. But now for 40 kmh I need (according to the app/trainer) about 280 W.
I'd be grateful for any comments on the apparent inconsistency there. Also, so I can dig a bit deeper into the calibration, is there a way of viewing any calibration factor(s) held by the trainer - I presume they are stored in the trainer, but was hoping the app would have visibility of them. The app's Trainer Settings page is empty.
Thanks for your help.