It ended up being a bit more complicated... regrettably. By that point, I had changed a ton of settings related to other stuff and wanted to start with a fresh config, so that's what I did.
After that, it still wasn't working as i hoped. I then set up an old 7131 on a different WLAN and SSID so i could test without disrupting production stuff. I did find that link you posted above to be slightly helpful in leading down the path, ultimately I found with the 7131 and 7532 (or 2x 7532) the "jumping" as I suspect was the issue. I'm a huge amateur at this and someone may come along with better explanations.
On the "receiving" AP - I went into the radio2 interface (config t, profile ap7532 profilename, in radio2) and did as the above article said.
Under "rfdomain" and basic tab - I also unchecked dynamic channel - but I don't know for sure this was or wasn't causing issues, but that's how I have it configured as it stands now. I made this change on both APs.
I noticed the first night I tested the bridge it kept its connection all night long - now it seems to be maxing out at around 1-2 hours (when I run a show wireless bridge stat). I haven't tested anything in production. The main thing I'm trying to test here is connectivity to multiple host APs, so I hope to transition this back into production side eventually.
Hopefully my rambles weren't too much to digest - let me know if I can be of any help as I t-shoot this as an ongoing experiment!