This should definitely not be the case. We are getting this fixed. We will have a reporting page up shortly to also make it easier to report these type of issues.
There's a site run by the Open Rights Group in the UK, recording incorrect blocks made by ISP-provided "parental control" filters.
They already check against OpenDNS, so I assume they'll add 1.1.1.3.
There are lists of overblocked domains: https://www.blocked.org.uk/stats