There's only a few reasons why your car stinks:
1-All the *dirt* isn't cleaned from the interior
What happens when you get dirt wet? It turns into mud. Even if you dump a bunch of dried mud inside your vehicle, it will still make it smell. Also, if there was prior food spills that got re-wetted, that's also a possiblilty that it's making the interior smell. If it's not cleaned with the proper products there's a good chance that you'll have a smell. If you had a food spill between the seats and it got wet while you cleaned and it wasn't extracted, you could have a smell.
2-The interior was still wet when you closed it up
Having the interior totally dry is essential. If you leave water inside of a brand new vehicle in a dark part of if it (like under the seats) and you close the door, there's a chance mold could form and cause a smell. So if this interior wasn't totally dry and you closed it up prematurely, you could have a problem. Add the dirty aspect from above and it's a recipe for a major problem.
I'd suggest buying a disinfectant cleaner (anti-microbial) and re-clean the fabric and then extract again. Try to hand dry (with cotton towels) as the car dries in the sunlight for several days. When it's totally dry to the touch (everywhere), you should be all set. Just to be safe, keep a window cracked on both sides to allow more ventilation for several days afterwards.