Overseas Dual Time Accuracy (Loss?)?

It's been 2 weeks since i 've bought my new VC Overseas Dual Time  47450/BO1A-9227. This period is actually a period of summer holidays for me so I am not wearing it at all times. Actually I am wearing it 2-3 hours in the morning and 2-3 hours in the evening. I never sleep or swim with any watch as I don't feel really comfortable. In this time frame till today I 've noticed that when power reserve index falls below 60%-70% of the maximum (which happens after approx. 12-15 hours of no use) then it starts losing accuracy fairly quickly. To give an example, until yesterday i kept the energy above 70% and it was running perfectly. Yesterday I only wore it in the morning and this morning the energy was in about 50% and it had lost 35 seconds!! Is this something I should expect?
Many thanks
I think you need to wear the watch for a few days continuously for the
08/10/2009 - 17:49
power reserve to be at max for some time. It is normal that a watch looses accuracy when the power reserve reaches the final hours of wind. However if the watch still has a long reserve of power (ex 7-8h) but looses 35s then it needs to be regulated.