3.3.1. gallery displaying overlapping pictures

Using the gallery, some pages are showing overlapping images while others are showing as designed. TIA for any help with this. ??

Settings are as follows:
Gallery Settings: Link thumbnails to: Image File;
Order images by: Random; Order: Ascending; Gallery columns: 3
-code from HTML= [gallery link="file" orderby="rand"] )

Example of working page (see images at bottom):
https://www.springerrescuegaal.org/2008/carols-corner/

Example of same config with overlapping problem:
https://www.springerrescuegaal.org/1790/senior-love-from-the-max-watson-senior-springer-living-facility-dotties-story/