Today I encountered a new bug, that is pretty easy to reproduce.
Basically, if you copy the Inline style (no modifications to it) on Dynamic Layouts and apply it to a Dynamic Layout, the copyed style will result in stacked input fields and not in inline input fields. I am using Pega 7.3.
Note: before asking questions I would love if you would try to reproduce it as it is pretty easy to do so I think.
I have debugged it further and the issue only happens if you have the case/flow opened up before you add the new format to the skin, and you try to see your changes with refreshing the case that was already open. In this case, the new style won't be applied.
If you close the case and you open it up again, the styles work as expected!
So to sum it up newly added formats won't have an effect (?) on already opened cases /flows.