I think I have found an "odd behavior" in LR (i use the latest release of August)
I organize the Library > by Capture Time
When in the Development room i pick 2 images and Edit > as layer in Photoshop
do the PS editing and flatten the layers (CTRL-SHIFT-E) and Save, then return to LR classic the save image is not organize by CAPTURE time but saved as a last image in CUSTOM ORDER.
This is annoying and keeping the SORT by in Library would be better