The Media Bias fast checker are tracking sites for disinformation. There's a bias. So read it taking that bias into account.
I've found that most fact check sites have an agenda of their own. A common technique is to misattribute or deliberately misinterpret a claim and then debunk the strawman.
https://www.factcheck.org/2016/09/trump-pence-acid-wash-fact...
>"Donald Trump falsely claimed Clinton “acid washed” 33,000 personal emails ... Clinton’s tech team used BleachBit, which is a free software program. It does not use chemicals."
About your selective and misleading choice of fact checked, you know very well it's about the "acid wash" claim, and not about what the republicans did. You don't need a fact checker to know what Trump said about Hilary and the mail server, nor why it was used and perused so relentlessnesly.
I've provided a quote and a link to one of the more memorable instances of what I found to be disingenuous fact checking. I'm not sure what else you can expect in this context?