Yeah many things about Bashir in DS9, before he was discovered to be genetically enhanced, seem a little odd. But then Bashir did do his best to hide his background, and not showing off was one of them. Still even with his genetically enhanced brain he was no engineer, as shown in that microchip scene in One Little Ship
This explains why Bashir needed to be guided through repairing that subspace transceiver, in Armageddon Game
, needed to be talked through the whole repair process by O'Brien.