I recently acquired my first grown-up watch, a Sinn 356 and in my ignorance I did not check the time that the watch was set to when I was setting the date/time. As such, it is possible that I changed it during the "danger time" between 9 pm - 3 am, which the manual states "a correction during this time may cause damage to the movement.
After observing my Sinn for a few days, it seems that the day/date exhibits strange behaviour and misalignment - for example, at around 11:13 pm, the day/date starts to change. At around 11:41 pm, it changes slightly more. (see pictures)
My question is: is it likely that I damaged my movement? And if so, should I bring it to my local watch repair shop to have it serviced? Any other advice or suggestions would be welcome. Thanks in advance.