DeAnna just posted this on twitter:
"Here's a secret......that exit from the rose ceremony was planned.....totally fake for an explanation for the viewers"
Pretty much confirms what we already know. I am guessing Jessie wanted to go? Someone wanted to go, and it probably wasn't the blonde (already forget her name, not paying close attention).
ETA: Someone asked why Jake was so emotional if it was faked, was it acting? And DeAnna replied: hahhaha...yes. A producer told him to act that way