Looked at the pics. Your new baby is handsome, but I love T-man, because shepherd-types are my fave, even though it's been a while since I had one. I think things will settle down once Mojo is not so hormonal! As for the rescue group, our dogs have all been rescues for many years. I could tell you some horrendous stories about some (but not all) of the groups who place dogs via petfinder. Our most recent is a good example. We were told he was very sweet, no behavior problems, and bomb-proof housebroken. To summarize reality, if he had teeth (there is not a one in his little senior head), he would have had to go back, he has been so aggressive in certain situations, esp. with my husband. And, he wears a belly band in the house, since lifting his leg on my furniture is one of his fave things to do.
But, of course we love him anyway.
For separation anxiety (T's) and thunderstorm phobia (also firecrackers), have you asked your vet about clomicalm or some of the other calming meds you could use?
Glad things are starting to settle down for you. And cannot wait to hear about your date. I am married to an engineer. We met at work, and I thought he was a little dull. But he was very interested, and chased me hard. We've been married for 17 years now. He is sweet, smart, hard-working, honest, generous, and loves our pets. Frankly, for me anyway, that trumps exciting.