Layout changes not coming through

We have 2 areas set up. DEV and UAT. DEV is my local machine, UAT is on our staging server.

Both areas have the same connection string, i.e. they are both connected to the same database.

I'm having the issue where after making a layout change on UAT, checked in, those changes don't appear on DEV.

I've tried resigning the macros, restarted the applications, cleared cache, restarted the app pool in IIS, but they still don't come through. Anyone know how to get it to work?

Thanks, John.