Filename shortening caused by sorter

Importing files with long names via sorter generates this behavior:
Drag and drop onto the pre-installed global Inbox Icon shortens the filename to 32 characters in DT.
Drag and drop onto self-generated folder icons leaves the names unchanged in the database.
Drag and drop directly onto the inbox icon in DT also works without shortening.

DEVONthink Pro Office 2.7.1
Mac OS 10.9

Many thanks in advance for your suggestions.