One of the most common time miss-match issues, is caused by “Log On” time when the DX’er starts calling the DX, then “Log Off” when the QSO is made. Always make sure that you LOG the UTC Time at the time you work the DX, not the time you started calling. This is the most common cause of OQRS and LoTW time miss-match. It is very important to understand when you are requesting QSL’s or uploading to LoTW that there is a built in time tolerance.