Changing title of request corrupts other info

I have build 5007 installed and have notcied that if someone send in a quick request (whihc doesn't populate a lot of the fields), if i go and edit it as administrator, it corrupts the data. Here's the history note from miy simple change:

Request Updated by : administrator
Level changed from NONE to Tier 1
CREATEDTIME changed from 1146001208074 to 1146001208000
Title changed from quickie request to quicky request
SLAID changed from 1 to null
DueBy Date changed from Wed Apr 26 10:40:08 NZST 2006 to Thu Jan 01 11:59:59 NZST 1970

The only change I "consciously" made was the title (in blue), but it has also changed the created date to 1970. It has also overwritten the SLAID, which seeing as this was from a valid SLA client, is not a good idea.

I have tried this several times and it appears to be a consistent bug.

John