Can I change the order of my galleries on my website?

Yes you can.

Follow these steps.

Browse to 'website' in the drop down menu under your avatar or on the dashboard. 

Then click 'customise' to access the website builder tools. 

Once in the website builder browse to 'Galleries page' under the 'Content' section (see screenshot) and then simply drag your galleries up or down the list to change the order in which they appear on your site.