I had similar issue. Taps on phone/tablets were registering as 2 taps but on my windows PC the mouse click registered correctly as 1.
I added a second condition to my event "Is on mobile" which fixed it on mobile but disabled my mouse on my PC.
I tried to add another event that tests if "On HTML5 website" platform but that messed it up on mobile again. Currently, while still in development I just disable the mouse event before exporting it. The above suggestions did not work at all for me, however it could have been my implementation of the solution rather than a faulty solution. Would like to hear what worked for you alvarop.