Dear Lisa,
About the blood types....I am A+, my husband is B-. We live overseas and had to get all of our five children tested for their blood types in case of an emergency. We have FIVE different blood types in our family, including universal donor and universal recipient. Our doctor laughed, said he's never seen anything like it, it is extremely rare to have so many different types, but it is possible! We like to say we are a blood bank in a famiily.
Also, both my husband and I are blue eyed. One of our children has greenish-blue eyes. I googled if blue eyed parents could produce brown eyed children, and it is possible.
Because the science of genetics is so new, maybe your grandparents or great grandparents (or even further back) could have had these conditions, but you didn't know about it....they don't always show up, even if you have the gene. (One of the reasons I don't ever want to have that type of genetic testing.)
Hope it makes you feel a bit better...I am not a scientist by any means, but I do know the blood type thing can happen, just as you have described, based on genetic inheritance.
Have a good day,
Pamela