It sounds like there were a lot of technical issues in Florida that led votes to be cast to the wrong person, as well as votes to be discarded entirely, which led to a case before the Supreme court where they said there was a deadline that had to be meant even if it meant discarding votes.
This one has quite a few details on the 2000 election and contributing factors I had not known about: https://www.smithsonianmag.com/history/rigged-vote-four-us-presidential-elections-contested-results-180961033/
It sounds like there were a lot of technical issues in Florida that led votes to be cast to the wrong person, as well as votes to be discarded entirely, which led to a case before the Supreme court where they said there was a deadline that had to be meant even if it meant discarding votes.
That does still leave the question of why the Supreme Court decided this way which led me to: https://www.britannica.com/event/Bush-v-Gore
And then there is this paper written by a university teacher, Miguel Martinez-Saenz: https://cah.ucf.edu/fpr/article/the-2000-presidential-election-a-matter-of-opinions/