We get our data from xml-soccer source so the problem really lies with them.
But of course we are also a fully editable database by all users, so if you see an error, please do fix it. Any user can edit an event.
EDIT: Oh I think this error may be down to timezones, all our times are in UTC time which may mean the game shows the next day. Not much we can do about that but you could programmatically fix it.