It is impossible to set a window to the same position from the "Center Window on Next Monitor" Action with the "Custom Move / Resize Window" Action.
This can be easily reproduced. Open "System Settings" (Small window with low max width and height limits). In BTT set the "Center Window on Next Monitor" Action on a trigger and test it on the opened "System Settings". Now try to mimic the position with the "Custom Move / Resize Window" Action on any other trigger.
Ok, I figured, that I didn't communicate well, what I want to achieve. And comparing it to the "Center Window on Next Monitor" is plain stupid. My bad.
This shouldn't even be a bug report, but rather a feature request or something like that.
What I simply want to achieve is, to resize the window and center it and that seems not to be possible. The window is deferred.
Now that I'm talking about it, I'm not even sure, how valuable that is, but yeah...I guess that is another topic.