Two thoughts:
1. Ben only told JoJo he loved her because producers told him to. I don't think anybody (including producers) expected him to say I love you to Lauren. If he didn't tell JoJo he loved her, then everybody would know he is going to pick Lauren. Due to his surprising remarks with Lauren, I bet they told him he must rectify the situation by telling JoJo he loved her too or ratings for the final rose would be poor. Need to simulate drama or people won't tune in.
2. Ben is definitely not calling one of the girls back on the phone (preview for final rose). I bet he is calling Lauren's dad for approval to take her hand in marriage. He is head over heels with her.
