Am I overreacting?

A little back story- my boyfriend is friends with a couple that he used to be room mates with. They're a little on the socially awkward side. They now own a home that they are in the process of evicting a roommate from because he hasn't paid them anything in a long time. They're extremely passive and hate confrontation, so instead of dealing with what was going on in their house, they've stayed with my boyfriend and I for the last week.

Initially, the guy of the other couple asked my boyfriend if his girlfriend could come stay with us for a couple days- he was working a ton of overtime, and she was very uncomfortable being in their house alone with the roommate. My boyfriend asked me if I minded, and I was like, no dude, of course not, she can stay here a couple nights, no big deal. I felt really bad about the situation they're in- they've tried to be really nice to this dude and he's basically doing everything in his power to be hostile. But then, when they showed up, it was both of them and their dog, who really, is tiny and adorable. He said he'd stay the night because she was rattled. Ok. I understand that. No biggie.........

But he stayed all week. Him, her, and the dog. Our house is not very large at all, and we also have a dog, who is big and kinda dumb and Marmaduke-ey. They weren't especially good at cleaning up after themselves. Like I'd get out of bed in the morning and pick up the prior night's dishes off the coffee table. Their dog started getting a little familiar and growling at my dog when he tried to come in his own house- and they had the nerve to scold MY dog, just because he's bigger. Any attempt I made at explaining that their ankle biter is no saint was brushed off.

They finally left last night. However, I didn't get a 'goodbye' or even a 'thank you' out of either of them. The room they stayed in, quite frankly, smells funny. Now, if I just dropped my life into someone else's house for a week, especially with a pet, I would offer at a minimum to clean up after my dog. Nope. My guest room was a furball, especially infuriating to me because I had said something to them about how my dog isn't allowed in that room because I keep my clothes in there. I definitely would have stripped the bed... or made it if I thought stripping it was going to be weird or something? Nope. It looked like a 15 year old boy had stayed there for a week.

I guess I'm just really surprised by the lack of what I thought were really basic manners. Is it me??