Hello @Susan_M_Davis
I believe this situation was introduced when this posting was placed: Launched: Stunning row detail views
It took me a little while to figure out what was going on and I think there are some situations when this works nicely, but I would have liked to make these layout changes myself rather than for this to have been applied automatically. The fix is indeed to reset the layout to standard and reorganize the fields again to your liking.
I agree with Daniel that this is not a bug but intended behavior.
Greetings,
Joost