An own goal by Luke Prosser condemned Vale to their third defeat in four games, and Glover has called for greater communication between his players on the pitch.
"After 25 minutes and they go down to 10 men, we thought we had a great chance to capitalise on that. Unfortunately we didn't," Glover said.
"[The goal came as a result of] a cross that we could have dealt with and I felt Luke the big centre-half could have dealt with it better.
"If he gets a shout from someone else, he could have let it go across goal.
"Unfortunately, being a youthful side, we are very quiet with it as well."