I have a seikomod with nh35, and im using Watch Accuracy Meter on my phone to measure the beat rate and stuff, the attached picture is of a seiko diver and my seikomod, the seikomod seems to be running around 13sec faster every minute. But also this seems to happen only around 7pm, when i wear it during the day its speeding up a couple seconds but nothing major. Any idea what the problem is?