Does a dog adopted out drizzling pee from excitement seeing me mean that she was happier with me?

We adopted out a boxador back in December and was rescued her brother in January. The people who adopted the girl wanted to adopt the brother and after some thought we said yes. Well today we went to have them sign the contract and I noticed that little miss has gotten pretty tubby and was VERY hyper and so was her brother who just went to stay with them on the 22nd. Both were jumping up a lot (which they were trained to never do) and little miss had taken up the habit of piddling from excitement which she never did with us. We take our dogs to the dog park 3 times a week and give them plenty of time to play with each other and the fact that two hyper boxadors were that wound up when we saw them makes me wonder if they ever get exercise. Then the boy tried to follow us out the door and the man had to hold him while we left. I know they're good people, but I do worry about two very hyper dogs being allowed to get that wound up plus the piddling issue. Was I wrong to let them adopt the brother? Does both dogs' behavioral problems mean that they were better off with me or have some other underlying issue? I'd like to learn from this so I can pick even better people in the future. I'm very happy that the biggest issue we've had is a lack of exercise and the dogs are clearly still friendly and healthy. I'm a bit upset, dogs just don't like being cooped up...