Is there a link to this data from election night and the days after?
I have an excel copy I got from somewhere and it pretty clearly shows the percentages that were reported are almost the same on every update. So much so that normal people would see and realize something is off.
The NEP is a consortium of major news networks — ABC, CBS, CNN and NBC — that pools together resources to gather vote and exit poll data. The NEP works with the consumer research firm Edison Research to collect timely and comprehensive election data on Election Day and in the following days, weeks and months until results are certified by all states. The NEP licenses data to several news outlets, including Reuters and The New York Times, among others.