Hi. I've experimentet a bit with export/import of apps to speed up my development process.
I've setup two sites, each with the same content type app, lists etc (just a clone of the first site).
If I do changes on Site A, export the app, install the app on Site B - I do find the newly created fields there, but they are not set to i.e. "site form". I have to add them manually. Is that correct behavior? Any way to get it it published to the site form instead?