This is literally a perfect example of how ST works. It's a known issue that A ST doesn't exclude correctly (no one knows why) and B when it's still powered, it hinders including it on the other hub (not just HE)
What you ended up doing is the best course of action + another step.
It's best to exclude the device/s from ST.
Then turn off ST
Then open the logs and exclude using HE this correctly wipes the device really for inclusion (your see a confirmation in the logs).
Then include the device in HE through the usual means.
I know it's a bit of a sing and dance but ST seams to cling onto devices so you have to do this to correctly delete it from ST.
For additional parameters that the built on driver doesn't expose there is a z-wave tweaker you can use. Just like you have done before your need to install the driver but it's built by @mike.maxwell once you have changed them (keep logs open to be sure) you just change back to the default driver.
I'm not sure with these as I'm from UK but I think they sound like older z-wave ones? If they are I believe they have issues with polling. As I understand as standard ST does a bucket load of blanket polling to all device to "fix" this. The issue with this is it puts strain on the network if it's not necessary and limits the size of your network. In HE you need to install a the poler app and tell it what device you want it to do it on (i believe, I have never had to use it).
No, just do what your doing and reach out, although ST and HE are similar there are subtle but important differences that you just need to learn, most of it is a straight swap but with 100% local processing. 
