I'm reading Reception timelines and I've come across, several time, doing the receiving line in between cocktail hour and the start of the reception. Make complete sense to me until I get to the detail of introducing the wedding party/parents/etc. when they walk into the reception. So, basically you have a receiving line to thank everyone for coming, they congratulate you, exchange some hugs, etc. and 15 minutes later you're introduced? Obviously it's not going to be like an introduction but I just find those two things to be a little reversed. Hey, we know you just talked to the couple for a moment and said congratulations one on one but let's welcome the happy couple! Maybe I'm missing something.