watch broke is heart broke for a watch lover, sorry to hear about your incident.
HT has been there for many teen yrs, don't think they will run away. personally I have many good experiences with Fxxxx but a moderate one with uncle Hxx.
so far we have heard 1 side of the story, I do wish to hear from another side. being a member here, even though not active, I do wish Fxxxx will reply to this and share his side of story.
from what I read,
1. watch has been purchased and wear for about or more than 6 mths
so I presume the watch is in good condition during the purchase, problem happened after 6 mths
2. when the watch have the problem of hour hand not moving but GMT moving, very likely the non moving hand is detached/loosening from the pinnon or the some wheels moving it has been broken. it can be cause by few factors.
a) manufacture problem, very unlikely for Rolex but not impossible
b) non well fixed during servicing
c) great shock such as bang or dropped
watch warranty if you read carefully the booklet attached with your watch box, its very very limited, not covering mishandling ( such as drop and bang, etc ), water resistant after a year without gasket replace.... wear and tear, etc
3. for case of EXP ii, movement been designed to quick set date clock or anti clock wise hence don't think its cause by time setting. however not pulling the crown to correct position to set thing might cause damage, this is a mechanical watch, aged watch crown spring always causing the wrong position as well.
I do hope HT can post a reply to share their side of story as well.