I had some images that I geotagged and noted they were in the wrong location due to the wrong time adjustment being applied. I deleted the images and re-tagged them...we'll I re-tagged them twice. I enabled "Import photos into Basecamp after tagging".
The first time, the filenames were correct (same as the original image). The second time, the file name was different and the third time, different still.
Below is an example of three images I experimented with.
First tagging (original filename) > second tagging > third tagging
IMG_8526 > IMG_8540 > IMG_8543
IMG_8527 > IMG_8541 > IMG_8544
IMG_8528 > IMG_8542 > IMG_8545
Why doesn't BC maintain (use) the original file name ???