Alright- update on these issues.
First the weather station in the android app. We have confirmed that this is a bug in the Android app, and we have reported it to our development. However, if it's any consolation, this is strictly a display issue, and the weather station your system is using is whatever you set it to. I have a hunch it may be a caching issue, if you have any interest in clearing your app cache I would be really interested to hear if that resolves it!
Second is the usage. I'm a little perplexed on this one, and cannot seem to replicate it. I'm curious if it has to do with unit conversion/international issues. Are you still seeing such a large discrepancy @WokingWounded?
And finally, the minute difference. @Linn is spot on, this is a rounding issue, and actually shows up a couple other places (notification emails as an example). This has been reported, and we are working to create a rounding "standard" so we don't continue to run into this. I hope this helps!