We are sorry to hear you've been having issues with our charts. We are aware of this particular flaw and intend to do something about it in the near future. We didn't anticipate people may want to use charts without a datasource at the time, but we are aware of such use cases now and are aiming to fix this soon.
With regard to the downvote, I'm not sure who did that unfortunately! Remember that this is a community forum and anyone can downvote or upvote questions. It certainly wasn't someone on the Shinobi team, as we don't make a habit of downvoting our customers!
If you have any more questions please feel to get in touch or post on the forums and we will be more than happy to help. If you do happen to find any more bugs then please raise a ticket with our support team.