My guess is that you used a theme to develop with that the others don't have (four were added in version 1902). It is usually safest to develop for the oldest version you have, which means you need to know the limitations. Since you split your db's into front and back ends we can rule out that everyone shares the same db and is inadvertently altering the design because it's incompatible for them, yes?
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.