First of all, don't use "time=nn" condition. Time will almost never be exactly 2.00 seconds. Even if it works on your machine, any slight change in fps or a micro lag can change this. Use Every X seconds event, Wait action, or Timer behavior.
To spawn multiple instances you can add a loop, for example:
Repeat 5 times
Create enemy at X=500+(loopindex*100), Y=200