Hi Dan,
I believe the problem with the preview is time based. It appears to be fine until around 2pm localtime (UTC+10) after which it display the problem I’ve mentioned before of showing the date as tomorrow with no waterings. Clicking on today returns to today but all future waterings show as a day later than they really are (including ones later today).
As before, let me know if you need any further info and I can provide it by private message if it helps to reduce the chatter on the main forum.
Thanks,
Andrew