The delay is probably due to a couple of factors. First, the Encana purchase. Takes a while to get everything straightened out, especially with new wells. One of those wells goes from 10 into section 3 and the other goes from 11 into section 2, so unless you are in those sections, you will not get paid on it.
Each section has hundreds of owners, so doing to title work for a multi section well takes months. Since two wells were drilled from the same surface pad, they may be doing all four sections at the same time. I suggest that you write a certified return receipt letter to Encana and remind them that they owe you interest if your title is clear. Keep a copy of the letter and the returned green card for documentation.
It may take a couple more months to get everything straightened out.