They are keeping him to ensure he will appear at the court date. If there is a trial to come, the same concept applies and their actions show some concern that he won't appear. If he has not been released during the last 65 days having no prior offenses means he's probably not going to be released. He will likely be kept in county until the trial is over.
https://www.inmateaid.com/ask-the-inmate/my-fiancee-has-been-incarcerated-for-65-days-and-has-already-been-arraigned-an-has#answer
Accepted Answer Date Created: August 09,2016