Invited to Bachelor Party but Not Wedding

So my FH sent his best man a list of about 10 guys he definitely wanted invited to his bachelor party along with 5 alternates, the idea being that if a bunch of the original guys couldn't go and a few more bodies were needed to "make it an event" or split costs those would be the additional people to invite. Included on this list are a few friends of friends (guys who are friends with the best man or other people invited and that we hang out with socially, but not people my FH hangs out with on his own). My FH made it clear to him that these were alternates and they were not invited to our wedding, as we want to keep our wedding relatively small (60-80 people). The BM went ahead and invited ALL of them (all 15 people) and so far he says they are all planning to go.

Not only did my FH not want a huge bachelor party (6-8 guys would have been fine), but now there are three people planning to attend his bachelor party who are not invited to our wedding (originally all five alternates were on our B-list but we've since extended a wedding invitation to a couple of them). Do people invited to bachelor and bachelorette parties generally assume they are invited to the wedding? I don't want to change our plans because of the BM not following my FH's guidance, but I'm a little annoyed by the whole thing. I don't want us to end up being the "rude" ones when the BM screwed up. Plus I'm upset that my FH is going to have to walk a fine line of politeness throughout his bachelor party and will be have to careful about talking about the wedding too much. This event is supposed to be his friends celebrating him getting married, not some thing where he has to be on guard and watching his words the whole time.

I'm also now worried that as the inevitable few "no" RSVPs roll in and we extend the invite to a few additional guests, we'll have to prioritize all of these people (keep in mind, these are friends of friends, my FH doesn't even have their phone numbers or contact info) instead of the other guests who actually mean something to us. I don't want to tip the balance of our wedding guests to people we're not super close with and that all fall on my FH's side, instead of being able to prioritize other guests who we didn't have space for during our first cut.

I'm pretty pissed.

Someone please tell me dudes don't care about this stuff at all and it doesn't matter whether or not all the guys at the bachelor party are invited to our wedding.