I don't think Meghan looks glazed over while talking to Edward as some posters suggested. It just looks like she's making polite small talk to me. Meanwhile Harry sits there flicking through his programme until she touches his arm to get him to join in the conversation, which he duly does.
Sophie wasn't purposefully ignoring Meghan either I don't think - it's just that where she was sat it was easier for her to talk to Kate.
All in all though the whole thing looks forced and awkward, despite the hellos and smiles from Meghan.