Re-ordering weeks in programs

From your 'My Hub' page (please see below)

If you go to the 'Menu' icon in the top right...

then select 'Programs' from the options

Click on the program you would like to edit

If you then hit the up-down arrows in the top right of the program...

You can click and hold the up-down arrows in the right corner of each week to drag into the correct order.