Microsoft Office 2007 Inbox emails dissapeared

I used to be able to move an email from my inbox into a folder and it would show in the folder and in the inbox but the message in the inbox had a line through it indicating that it had been moved. Now the messages are still in the folders i move them to but it no longer shows the message in the inbox with the line through it. How do i get it to go back to the way it was. I need to be able to go to a specific date for an email because i sometimes forget which folder i move it to.