Note bleed on single notes

Is note bleed on single notes something that will generally begin to correct itself with more experience on the harmonica? I've been practing probably a little under 2 weeks now, generally an hour a day, and I still get the occasional screw up when shifting holes and bleeding air through two at once. I'd say about 75% of the time I'm playing single notes just fine, but I still have quite a few mishaps. It seems most noticable when I'm jumping from say a 4 to a 6 or trying to play faster.