My issue is brand new - to me, anyway - and odd. Today, each time I try to export an image the entire selection from that date range is exported along with it. I don't see that anything has changed in my export selection - and I don't see anything that would cause this to happen there anyway.
I am a Lightroom CC subscriber - help!
You are selecting more than one photo or more photos than you think you have selected. LR is then exporting all the images you have selected.
LR in no circumstance selects images on its own or exports more images than is selected when the Export dialog window comes up.
Or you are not selecting an image at all - in this case Lightroom exports all photos in the selected folder.
Try menu EDIT/SELECT NONE and then select one photo and export. If it still exports more than one than I would restart Lightroom and try and if that doesn't work that reset the preferences.