Here’s a thing:
Thanks for getting in touch. This doesn’t look right - I’m sorry about this!
We’ll have a look into it and get back to you.
It’s possible a previous brewer put in a nonsense value. 
I think that will be it. We’ve given this a test and believe it’s functioning correctly.
If the batch has multiple turns and this is a per-turn reading, make sure to check all turn values. If this doesn’t resolve it for you, please let us know. Cheers!
That was it. Thank you. Sorry.
2nd turn was the trouble. Worth doing a feature request for the points re. multi turn batches to be labelled by turn as well? You know, for tired, hot people?
Haha, yeah, that could be a good feature request 
At the moment, it’s an average of the values on the batch, but splitting them to show multiple for each batch (where applicable) rather than an average could well be helpful.
Thanks!