You certainly have a mess on your hands. So sorry these guests are being so thoughtless. You're place looks special and you have some very nice reviews. It's no doubt they wanted to stay there.
You let them coerce you into taking up more space than they booked - that's totally on you since you said they could spill over and, presumably, sleep, in the LR. You also let them add another person without saying "no" so now you have another guest that is not paying. Both of these things should have been met with stern and vigourus NO on your part. But that time has passed... a lesson for the next time. Assuming that you have let them have the entire apartment for $65/night, you can at least charge $15 for the extra guest. Use the Resolution Center to get these funds.
You need to talk to them about the cleanliness and following the rules. Move back into your apartment immediately, don't let them force you out because you will be cleaning up this mess after they leave if you don't tell them to clean it up now. If you are not there, the speculation of "if" they are violating your rules is just that and you will not have recourse for getting the place cleaned and santized.
You also need to make your listings seem very, very different. The accomodations are the same at both prices, even the pictures are the same, so why would anyone take the more expensive one? Personally I would make the $65/night for the extra beds only - no access to the sofa bed and no extra guests permitted (so max 3 people). But hey, that's just me.
If they depart and leave the place in a state or actually damage your collections, take pictures, lots of pictures. Get quotes to have it cleaned and present all of this on the Resolution Center within 24 hours or BEFORE THE NEXT GUEST CHECKS IN (whichever is sooner) to open a claim. It appears from your calendar that you might have back-to-back guests. You do not request a security deposit (which I would also recommend you add to your listing) so getting the guest to pay for this may require Airbnb's assistance.
The key here for a successful turn over is to go back and be firm about boundaries and cleanliness. It's your home, be firm but polite. And charge them for the extra person at a minimum.
Then, please, give them a thumbs down review and stick to just facts, keep it short, and say "XX and his friends would be more suited for a hotel" somewhere in your review - probably in the first or last sentance.
Good Luck.