Winding problem?

[Peter]

After "swirling" to get second hand moving, I noticed that winding felt "light"; almost too easy. I could hear the "clicks" when turning crown counter clock wise but nothing when turning clock wise. After 25-30 winds, I did not feel any initiation of resistance as I normally would. Screwed crown back down and tried to wind again. Did this a couple of times with the same result. I then "swirled" about 40 times and set current date and time. On a whim, I re-set the date through the entire wheel. Now, I can feel the resistance in winding (as I should after "swirling" that many times).

I do not wear it everyday. This past Sunday was the last time I wore it and power reserve ended around 10:00AM on Tuesday.

It's a 6MIL DD (18078) last serviced by Dallas RSC in late Aug. 2009 for warranty work from NY RSC, but out of original warranty from NY RSC.

What could cause for the watch not to manually wind initially, but do so after re-setting the date through the entire wheel?

Any and all input will be greatly appreciated. Thanks in advance.

Peter