While it is a pain I still need different resolutions of photographs imported into different folders for my website resolutions, crops, and to print. Was easy before the last upgrade how do I do it now? It tells me the photograph is already imported. I want to keep the same name just different folders with different purposes.
I like lightroom as a catalog that works with a photo editor.
I think your only options are renaming the files, or going back to the previous version.
I use LR for web images myself, but I only keep the master file in the catalog, and have a number of export presets for the various sizes.
(to avoid confuson, I also rename them on export)
There is no need for me to import these files back into LR.