Thank you for your prompt reply. I did not explain myself well in my previous post. I was using the Gallery button above the editor each time. The shortcode that I showed above was created by button and while it selects the correct gallery name, it chooses the wrong gallery number. For example, if I update several posts in succession, the button will keep the same gallery number for each one. Here is the shortcodes created by the button in a post where I use the button to insert three different galleries in one post:
https://drive.google.com/file/d/11XFGNeI6q0pXr5MjnS7NWV0czeqS4nOM/view?usp=sharing
Note that in the link, NCFC Meeting May 2015 should have a gallery code of 87, March 2015 a code of 88 and January 2015 a code of 89. The gallery code shown, 113, has not been created yet.