Hi Kavita,
Any modification to a project will trigger an automatic save: changing the project title isn’t necessary by any means (although it does constitute, indeed, a modification to the project)
The browser you use also should not make a difference. This is a farm-internal problem, and the only workaround I have found so far is to delete the faulty file from the project (after saving a backup) and recreate it, to prevent the farm from maintaining parallel copies (reference)
Jeremy