Hello,
are you using Dreamweaver CS6 to upload files to a Business Catalyst site ?
We currently don't support file permissions in Business Catalyst and we return either 666 for regular files or 766 for folders.
The behavior you are describing is indeed strange since our FTP server prohibits setting file permissions, so even if Dreamweaver would attempt to change them it wouldn't be possible.
Can you please describe in detail what are the steps to reproduce the problem ? Does it occur on all datacenters on only on some ?
Thank you,
Iulian.