So, your info is really good, but, you may be fighting the simple programming capability of that system.
In my experience, as long as the IAC value doesn't sit on an extreme, 0-10 or 90-100 (assuming your scale indicates % open) I let it sit wherever it wants. The idea is that as long as it has room to open or close as required, I don't care if it's at any exact point
That being said, I didn't comprehend that 13.5 is their default, they must expect that the system will be used with cams with some overlap and then just account for the raw fuel.
Now, one concerning thing, at idle, white smoke, usually isn't fuel. Fuel will be black or hazy dark gray, and to be honest I have never seen an engine smoke at idle due to unburned fuel. Once you goose it, it usually will barf our a black puff, but to have white smoke to me sounds like oil (very light blue, not white) or antifreeze (white steam), additionally check your brake fluid level to make sure it isn't sucking brake fluid due to a bad booster or master cylinder.
As far as your question on a/f ratios for cammers, I'll jump in but I am NOT a cammer guy. First, true the cammer is likely prone to more scavenging which will pull more through at overlap, hemis do that. However, usually not so much an issue at idle, there just isn't that much of a negative pulse in the exhaust with no load and low flow. Additionally, comparing one a/f number to another is very difficult, location of the sensor, type of sensor, how the programming interprets it, is all different. All you can do is loosely compare information, especially at idle when exhaust flow is low.
For giggles, how far away is your O2 sensor from the head, just a WAG, don't need you to measure it unless it's easy. Also, is it pointing at some upward angle? I actually have mine slightly too far back (right behind the collector on the H pipe) and I had to program a delay into the tuning to account for the location. Of course yours can't do that, but that could explain some goofy behavior.
If there is any way to take a movie of your smoke though, I think it would help, for the tuning setup you have, it shouldn't be smoking and the description, to me anyway, doesn't sound like fuel.
One last comment, can you shut off learning, and if yes, do you when programming and test driving afterwards? I have had very good luck with programming until I am happy, then enabling learning afterwards