Basically, Team Trump is casting doubt on the vote counting in the states he’s currently losing or where he’s up now but expected to fall behind later, while encouraging the continuation of counting in the states where he’s behind.
I would say “politicians gonna be politicians,” but Team Biden isn’t acting this way. Team Biden’s being consistent about counting all the votes everywhere.
In reality, what the campaigns say doesn’t matter, or shouldn’t. It’s about following each state’s election law.