If a user logs in at 9.am and logs out at 9.20, the user should be able to either enter the log-out time as 9.15 or 9.30 and not 9.20. Currently, Web TimeSheet does not have this feature however, a suggestion can be raised to our product management team. Click the link below to submit a suggestion,

https://www.replicon.com/customer-zone2/contact-support/