Clumsiness as a pup, especially an ASL, have nothing to do with HD and everything to do with structure! I have seen GSD pups at AKC shows whose back legs looked like egg beaters and wondered how they could walk...but then the same dog months later went much better....this style of dog just moves differently and as a puppy that extreme angulation just makes their movement look bad. Has nothing to do with HD, some of the really angulated dogs I have seen have OFA Good hips.
I would not worry about HD right now, let the pup grow up, he will get in better control of his body as he gets older.
Csabre Sch1, Hexe Sch2, SG Bengal, Lynx, Komet, Kira HGH & Kougar v Wolfstraum ~ Ziberia IPO1 ~ ATB Basha, Kougar & Kyra, Fenja, Sch3s, Cito, Sch2, Danger RH & Alice Sch1s ~Kelsey