To make sure I understand the issue: are you using Firmware 2.1.0? Auto-DST detection is only made available in Firmware 2.1.0. If you have earlier firmware versions, you will need to manually change the time zone to adjust the time. To check firmware version, in the web UI, click on the icon at the upper-left corner to bring out the sidebar, then click on About. It will show you the firmware version.