When I have two soldiers down, I realized that I can't control which soldier I dash to when I press e. I would hover my mouse over one soldier and I would dash to the other one.
After testing this several times in a custom, this is what i found:
-you can choose with soldier you dash to if they're not within each others AA range
-when 2+ soldiers are within each other's AA range, when you press e, you will dash towards the soldier nearest to you
This has actually led me to missing my e on the enemy a lot when I'm trying to execute them.