Hi guys, after browsing through the comments, I found that there were at least 2 possible reasons why duplication of trades took place. One was through opening the EA from two different devices/sources, and the other was a potential broker problem.
There might be another reason for that, which would involve the VPS.
Sometimes there are technical errors when logging-off from the VPS, so much so that when logging-in once again, the VPS might recognize you as a different user, and thus, it creates a different session for you, considering you as different user (although you may not necessarily know this outrightly unless you go to Task Manager, and then go to Users, and check if there are more than 1 user). And being recognized as a different user, in effect, the number of MT4 terminals are basically doubled. Consequently, this will cause duplication of trades.
So how to avoid this?
1. Close all MT4 terminals in your VPS
2. Log-off from the VPS (don’t just close the window of the VPS)
2. Right click on the VPS shortcut
3. Go to Properties
4. Go to Target
5. Add (space)/admin to the address found in Target
For example:
C:\Windows\System32\mstsc.exe /admin
And that’s it. I hope this helps