Classifying Account

In Q2007 (you don't say what version you are using), in the Investing Center on the Portfolio tab (you didn't specify this, but it's the only tab in the Investing Center I can find with a "Show" drop down); the names of the "views" that appear in the drop down are customizable ... and Quicken doesn't come with any names like "Retirement" or "Non-retirement". So, my guess is that you assigned those names to two of your Portfolio tab views.

Not only are the names of the views customizable, but so are the contents of the views; you can choose from a wide variety ot options to control what you see in each Portfolio tab view. Among the choices are the accounts that will appear in the view. In Q2007, with the view you want to modify displayed, you would click the "Customize View" button, and select the accounts you wanted in the view from the "Accounts to include" list.