Hello Jie,
Yes, all the EAs that I generate every new month come with different Magic numbers.
Now the courses as Top 10 EURUSD, Top 10 GBPUSD and Top 10 USDJPY, Top 5 EAs, are with same EAs, and I just update them every 2-3 months when ever optimization is needed for some of the EAs. For the Top 10 EURUSD this month was not needed to have an update, that is why you see the last update.