New 2008 Submariner gaining time????

[N5XTC]

I purchased a 2008 submariner 10 days ago. I wear the watch ALL day, from morning til 8pm. then, i lay the watch on its back (face up), same each night. the watch went from +2.5 1st day to +4 then +5 a few days now is +6.

the watch seems like it is slowly speeding up. i set by atomic clock, have many many watches so know how to check this very accurately.

the watch was purchased at a local jeweler and had been recently serviced by a respected rolex person.

is the watch just "breaking in" from the service (prob did not run much til i purchased it) OR does it seems like something is wrong because it is slowly speeding up. in other words, it is NOT consistent. i could handle consistent any of those #s.

if this continues, i will get 2 days of +6, then up again from there.

there is a year warranty on the watch. but, i hate to lose her for a few months (i am sure it would take time). so, for now, i am continuing to check her daily and record results.

any help, thoughts, advice appreciated.