C.D.
Well, at sixteens months we shouldn't be expecting a perfect gait, but that does sound kind of unusual. My own daughter was bowlegged and grew out of it by age five, but then again she never had problems walking.
I wonder, does she ever walk like that when she is barefooted? If not, I wouldn't stress too much. Hard soled shoes are awkward enough for some adults to walk in, much less toddlers. Also, some shoes (especially hard soled) are cut more narrow than others. Does she express discomfort or try to take her shoes off before or after this happens? She may have wide feet, or one foot wider than the other.
However, if you find her doing this regardless of what she's wearing and/or she does it with increasing frequency take her back to the doctor. I would especially be concerned if it seems that she's not doing it intentionally.
Sometimes you have to be a little stern with doctors, they're so rushed, but your concern deserves to be addressed. Sometimes foot dragging is nothing, but sometimes it can be an indication of something more serious. Either way, being "balled up for ten months" is not a real answer.