Hello from Medialink,
The Time Zone issue is a known issue that will be fixed in the next firmware, however there is a work around:
In order to set the Time Zone to yours, select the following Time Zones instead:
For Eastern: Choose (GMT-02:00) Mid-Atlantic
For Central: Choose (GMT-04:00) Caracas, La Paz
For Mountain: Choose (GMT-07:00) Arizona
For Pacific simply choose Pacific.
Click Apply after your choice and it will save to the correct time zone.
As for your router automatically resetting to default factory settings, that is an electrical defect and is not a normal symptom or problem of this router. There is a 1-Year warranty on this item so we can replace your defective device for you. Please give us a call at 856-216-8222 Tues-Sat 9am to 6pm Eastern or email us at firstname.lastname@example.org