Labels

I have an annoying tech support issue and I find Blogger's help/contact supprt pages impenetrably dense (I just want someone to email to fix something). The problem is this: Some of my labels are not showing up in the sidebar, particularly for my early posts. I had exactly the same problem with American Hate when I set that up a couple of months ago, but it seems to have resolved itself. Does anyone else have the same problem and know what to do about it?