If you do not have a layout "active", and then you update one of the saved layouts to the current layout, I would expect Logos to realize that the updated layout is now "active".
That seems a reasonable expectation.
I will make a case for Development to consider that request.
We plan to implement this suggestion in a future release. (For now, the workaround is the two-step process of updating an existing layout to the current snapshot, then loading that layout.)
This behavior will be implemented in 5.1 Beta 1.