I agree with Joyful that Lisa and Hank were probably not told about the abrupt jump into the wedding ceremony bypassing the PROPOSAL. They (Hank and Lisa) probably had planned on Hank making his speech during the PROPOSAL about having a non-televised wedding and were surprised at the change directly to the ceremony. I am guessing that Hank was reassuring Lisa that he would now do this during the "vows at the alter", and not to worry.I think it was pretty tacky of the producers and Brian ("doesn't my hair make me look cool, stick-boy) McFayden to try and force and/or guilt them into going through with the wedding. I am sure they knew about Lisa and Hank (as I think they knew Hank would be the one) not wanting to get married on TV (and were not too happy) and hence the jump over the PROPOSAL to the actual ceremony - Maybe this would force them to go through with the televised wedding by catching them off guard; and if that fails then in steps Mr. Stick-Boy with his "don't you think you owe ......." song and dance line hoping to guilt them into going through with the wedding. Bad, bad, bad network execs - must not mess up their show format.
But Lisa and Hank had the last laugh - good on them not to give in to network exec pressure - but to see if the relationship was a workable one away from cameras and a contrived, scripted environment.