Hmm..are you sure they're all adults? Check the age. Perhaps you have to be a certain age to watch the Dating show. Maybe your Tamagotchi's needs aren't full? Or maybe it's just a glitch?
Your Welcome I got when my could not marry but I reackon it gives you time to recored your tama's that are not marrying because you can only choose one. I recomend you record your tama's that are not getting married because it dosent show them in memory. Hope this Helped.
Well, your tama has to be at least an adult for 48 hours unpaused, and the matchmaker gets angry because your tama is not old enough to be on the show. ( the matchmaker hates kids. lol)