I decided to fire up my 3D Printer again after a while. I have new PCs, so I had to download Slic3r fresh, so I got the latest version (1.2.9). Then I went and found my old config file. It's really old, from 2013!
And Slic3r did not load it when I told it to, and consequently, when Octoprint was telling my Printrbot LC (custom) to print my things off Thingiverse, it was not in the bed, and the x axis skipped a few nubs, as would happen when you tell it it's too far away.
I recall having to double and triple check Slic3r to make sure that it actually loaded the configuration I spent time crafting and honing. However, it's obviously been 3-4 years since I last played with this stuff, and this is a very low level feature that should have been fixed at Day 0 or 1.
I presume that I'm doing something wrong. Do I need to stand on 1 leg and hold my mouth just right? I don't even know how I could screw it up...
I changed from "Simple" mode to "Advanced" mode, and the config imported fine. Though, I don't think it was my most recent config. C'est la software!