Why there is a difference between the gps timestamp and "the seconds"?

[FlexibleLearning.com]

Looks like a 1 hour offset, plus a bit of lag.

Hugh Senior
FLCo

> Hello,
> 
> With mobilecurrentlocation() we can get the timestamp : "the time at which
> the measurement was taken, in seconds since 1970."
> if the same time i get "the seconds" ("The seconds function returns the
total
> number of seconds since midnight, January 1, 1970 GMT.), I do not get back
> the same value, even if the coordinate change and seem to be good) :
> 
> timestamp : 1445675392
> the seconds : 1445679061
> 
> This is not always the same offset, but it's always "big".
> 
> It is normal ?
> 
> Thanks