its not just the inconsistency of the referring (though i totally agree with you)
its the inconsistency of the way the pundits in particular (and sky especially who have a huge impact on these things and lets not pretend they don't) interpret things
The example of the barnsley on silva one that you gave...quinn (who is a fucking disgrace and should never be allowed at city again and every fan should boo and jeer any time he sets foot in the place) said that it was a (and Im paraphrasing here) tough but fair tackle.......The guy (and others like him - Mcmannman, owen and various others) are facing disgraces and are openly effecting the outcome of Fa decisions with the clear bias...and as a knock on effect they affect potential results