I restarted today my debian box running deluge 1.3.1 and all the deluge config files got rewritten

Question 1: would there be a reason for deluge to overwrite config files at restart (for an otherwise perfectly working install)?
Question 2: is there a way to either recover my torrents or somehow download a new torrent which would take into account the existing files (including large, but uncompleted ones)?
Thank you in advance for any hint.