I couldn't get the attachment link to work, but by linking right to http://www.apexsoft.ca/adwords.jpg I can see what you're asking.
This is a feature recently introduced into Adwords that moves the content from the Description Line 1 into the Headline. The guidelines state that if Description Line 1 is a full and complete sentence, Google may create the longer headline.
In your screenshot, you can see that only the highlighted ad has a gramatically correct and full sentence as its Description Line 1, and as a result it's been moved to the headline.
The other two ads are both missing what in my opinion are crucial full stops that severely impact the readability of the ad when displayed in the top-box three-pack -- let alone prohibit the "headline increase" promotion!
AFAIK there is no way to trigger this per se, it's all at Google's discretion. Rather than changing the text of your ads to include a fullstop you might get a quicker result by creating a new ad that contains the same text and the grammatical fixes.
Hope that helps!