Hello,
I encountered a problem about zenphoto's album that for example, Today is 2015-01-02,I uploaded a sub-album and set a upload day eg 2014-09-01 after a few hours except the images that I had uploaded all information gone and the created day rollback to 2015-01-02.
Does anyone know about this?
thank you

I am not sure I did understand correctly. If you uploaded an album today the upload day of the album is today as is that of the images. Images have several dates which depends on the file time, possible embedded meta data etc.

If you refresh meta data after uploading information can be overwritten since that meta data is fetched again.