Hi Pino - I, too, like to use WATCHES....but generally speaking, I use them to monitor Jobs or QSYSOPR. While I have not used it for PAL or LIC etc, I do find it useful to (temporarily) include a DMPCLPGM near the end of my program so I can troubleshoot any issues that I may have. My 'guess' on the message timestamp, without looking at your code or anything, is that perhaps you are 'off' on your placement for where the timestamp is located.
Don't forget, if you change the program you need to end and restart the watch event....
Hope this helps you some..Rich