Open Graph Warnings That Should Be Fixed

I am getting the following warning message in fb debugger:

The parser’s result for this metadata did not match the input metadata. Likely, this was caused by the data being ordered in an unexpected way, multiple values being given for a property only expecting a single value, or property values for a given property being mismatched. Here are the input properties that were not seen in the parsed result: ‘fb:admins’

any reason why?

https://www.ads-software.com/extend/plugins/social-graph-protocol/