Link URL in Adonis Pro Theme not Working Properly

Blog Site URL:reidmcnallyblog.com Photo Site URL: reidmcnallyphotography.com PROBLEM: When editing a post in Edit Mode and working with an image, I enter the link copied from my photo site and paste it into the Link URL field of the blog site, update the changes, and for a while everything works fine. Then, going back to the post later, no longer in Edit Mode, the hyperlink action pulls up a related picture from the overall collection but not the correct one to which it was previously successfully linked. I've repeated this a few times now over a few days and have gotten the same results. I only have two posts in my blog site. The scenario above describes the process from the more recent one posted this year on March 30th. The other post, put up on 9/22/17, when it comes to administration, uses some older algorithm and display a little differently, but the problem in both posts manifests the same way. The bottom line is links entered correctly for some reason later hyperlink to a wrong but related photo from the same gallery, pulled from my photo site, not photos that are even in the Media Library. For me, this is really annoying to say the least, but from the user's perspective, I would imagine it's something that looks sloppy and unprofessional.