No, kd, not wierd. Z, my 11 yo Aspie is obsessed with learning anything and everything at school, gets upset with reviews because "why do we have to talk about this, I already know it". But, at home, he will focus for hours, if we let him, on his video games. We forbid viddeo games on school nights(me included) so he focuses on reading, he has just about finished the eight book PENDRAGON series he got for Christmas.
The only suggestion I would make is to see if you could spike his interests in a variety of areas. Good luck.
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Aspies, the next step in evolution?