I have a problem in that a gallery is being displayed in reverse order by filename.

The images are named "2017-04-18-business-showcase-00.jpg" thru "2017-04-18-business-showcase-65.jpg". They display in the correct order in the Simple Image Gallery Pro component display but on the article display, they are showing in reverse order. It has 'always' been my understanding that the images will be displayed in the order of the filenames using standard A-Z and 0-9 conventions. You can view the gallery below and if you hover over the images, the status bar will display the filename which you can see is in reverse order. Very strange. FYI, I have clear the Joomla cache completely as well as my browser but that didn't help. I tested on Chrome, Firefox, Edge (IE) and Safari. Same results.

headlandal.org/the-chamber/archives/177-headland-business-showcase-under-the-stars

Anyone have any idea what the heck is going on?

Hello,

You need to double check the ordering settings which are located in the extension's parameters.
In order to access the params, open the sidebar and click on the gear icon.

Krikor,

Thanks. That was it. I'm not sure if my client set it this way or not but I am assuming the 'default' order is by filename. Is that correct?

The default is like Joomla!'s default.
The latest image is shown first.