u/ThanksALotBud

Went to DMV (Waterbury) Saturday for 11:00 am appointment to register a used truck that I bought. Went in at 10:50 am and was out the door by 11:20

Thursday, I got the title in the mail. Holy crap! This happen back in March and I'm still amazed how fast I got the title.

I have AB+ blood type. Confirmed with American RedCross after I donated blood. I have also taken DNA tests (Ancestry and 23andme) and it confirms I'm related to both of my parents (even though they've never taken a DNA test or blood test, I'm related to both of their family members that did)

Here is the issue. I have a sister, she is older by a year. She insists she is O+

But that's not physically possible if I'm AB+

Either she is misinformed or I just uncovered something bad. She just called me an idiot and claim I'm wrong. Mind you were are not kids. We are both in our 40s. She has a PHD and pretty smart. Our parents find this funny, but now my sister is pissed at me.

What do I do?

Called DMV, was placed on hold for 40 minutes, got frustrated and hung up. Called again the next day, on hold for 15 minutes and they hung up.

What is the answer? I know I still have 18 months to go, but I still like to know in advance.

Also, the car is already registered as a classic car since it turned 20 4 years ago.