I had a bachelor group of males from my hatch of 16, and all was fine for months until their hormones kicked in and they got fighty. Right now I've got 10 quail across 4 hutches... three pairs (one male, one female) in the smaller hutches and one male with 3 females in a big 2-story hutch. They're all doing great, nobody fights, there's no incessant crowing for a mate, and no overbreeding the females. Before I lost some to rats (evil rats found the cages, and slowly murdered a few over a month before I gave up and moved all the cages into my garage) I had 2-3 females per male, and could switch the females around for the most part with no issues.
If you've got 9 total with 2 of those males, I see no reason why you can't split them up with one male with 3-4 girls each. I know some people say you need at least 4 girls per male, but my pairs do great and snuggle/nest up with each other with no issues at all. Ideally I'd have more girls with the boys, but since a male by himself is going to crow constantly looking for the rest, it is easier and quieter for me to give everyone a girlfriend than to cull out males that I've hatched and raised. Just do the best you can with them, and just so you know they heal up decently quickly if given the chance. I went out one morning to find the aftermath of a rat attack, with one female dead, one female alive with her back ripped up, and one male with the back of his neck ripped up. I cleaned their wounds and then let them scab over to hold everything together, and they've healed up to the point you'd never know anything happened in about a month's time.
To answer your other question, the males can get along just fine if there are no females present at all, and their hormones haven't already kicked in. Mine lived almost a full year as a bachelor group of 6, then the next spring started to turn on each other. I'd either have just males in a group, or separate the males out with some girls.