Gosh, I'm so sorry that you had to go through that!
I'm willing to bet it happens all. the. time. And you know whenever a child crosses into another country, there's all sorts of re-do's happening! (Just because!) The articles about the Somali refugees made it clear that those children were shot up more than just once. The rate of Autism was higher and the Autism was more severe among this population.
From my prior work with refugees I can tell you that it does not matter what they may have had in their home country -- they are all re vaccinated upon arrival in the U.S. There are very strict/structured programs for refugee health.
From my current work in a public hospital -- one of the major "care initiatives" is to vaccinate EVERYONE who is "eligible" for flu and pneumonia. Today I arrived at work to find a note posted on a board at the nurses station "all eligible patients should be vaccinated against pneumonia on admission. if the patient cannot consent, it is ok to vaccinate them, per the nurse manager" WHAT!??! Regardless of my "pro vaccination" / questioning status .. this totally goes against everything in me, screaming VIOLATION of PT AUTONOMY! I would never, ever, ever just vaccinate a person if they could not consent and I could not determine when their last vaccination was. I questioned it on several levels. The only person who really seemed to care was a chaplain on the ethics committee. Our NM kinda tip-toed around the topic. My point here is -- even adults (who oftentimes pay absolutely no attention to what medications / injections they are given) are frequently double, triple or more-dosed on their vaccines b/c the cannot remember what they've had -- and hospitals / doctors just say "well, then give it again".
Glad you had a close-call, instead of a repeat booster. Aside from all of the various complications that anti-vaxers speak of -- the CDC and doctor would tell you there is no risk associated with additional boostering above and beyond the recommended dosing. Go figure.
I read the coverage on this a while back (last year I think) on the Huffington Post.