My boyfriend Maxed out his time, but he got a dui in another county , he got house arrest. The recommitted him to prison. Now he maxed his time out. How can the parole system do that?

The parole system didn't "do anything" outside what they were supposed to do. What you should be focusing on is "Why your boyfriend can't keep from getting arrested for things like a DUI"? The parole system doesn't tolerate an offender with multiple offenses, who doesn't take the leniency of early release seriously. The only remedy is a simple formula that can only be overcome by staying out of trouble.