I've set up my macros folder as x:\yyyyyyy\zzzzzzz\Macros (as shown), and have macros in each the subfolders.
@MarqueeCrew's excellent Outliers macro is in the General Functions folder along with its 'Udacity' subfolder.

In Designer, my Macros menu brings in macros from each of the sub folders as shown below. However, the Outliers macro appears on a separate Macro menu and the Udacity subfolder shows up on a third macro menu.

How can I tidy this up and make them all appear on a single Macros menu?
N.B. the five macros showing in the screenshot are in different subfolders and putting them all into the same folder hasn't resolved this.