First off, the "whitish smoke" is almost certainly water vapor
condensation, not smoke. That's normal in cool weather

As for why it only showed on one pipe, that's easy. Its fake dual
exhaust- one pipe comes from the engine, through the catalyst, and then
it splits to go to the two tips. Same for most all 4-cylinder and v6
front-drives from all manufacturers. Its pretty normal for only one of
them to carry much flow, although I think the manufacturers tend to at
least TRY to balance the flow a little. I remember the 90s Pontiac Grand
Ams and Grand Prix were set up so that the exhaust pipe went to a
muffler right behind one outlet, and then a crossover pipe led to the
other outlet and it frequently wouldn't carry any flow at all, which was
really obvious on cold days when the exhaust condenses and is visible.

About the only true dual exhaust you find these days is on V8 cars like
Vipers, Corvettes, Chrysler 300s, Dodge Chargers, and Magnums, V8
Mustangs, and Crown Vic Police Interceptors.

You will see that in most new vehicle until the temp has
been at normal long enough to burn off the anti corrosion
coatings and oils.  You would have probably seen the exhaust
manifolds "smoking" if you had raised the hood.

Lugnut