Mutiple fill in the blanks on one slide?

Hi, 

I'm really new to Articulate products and trialling the software for potential purchase. Multiple Fill in the blank is one activity I'm trying to make as it occurs a lot in my field. I followed the screenr, which is awesome, but every time I add a text entry, in this case named derrick, in the panel on the right a trigger is created which states " set text entry 3 equal to the typed value When the control loses focus". This trigger is automatically created for each new text entry. On the screenr this doesnt appear to be the case. 

I can't delete this trigger, and consequently when I add the triggers for correct and incorrect buttons as per the screenr, then preview the activity I get a message saying "Invalid answer. you must complete the question before submitting"

As I said I'm really knew to this and guess there is something really simple that I'm not doing. 

Any help appreciated

Steve