Import issues,

I hope it’s okay that I bring in my own problem that’s in the same field:

My workflow: I start in Lightroom → then open from LR directly into Photoshop via the right click → “edit in Photoshop”. After working min Photoshop I click “save” - and then image is back in LR now with the changes I made in PS.

The image comes back in the same order of files it has before going into PS and it has the same file name + “.Edit”. 

When I then export the images from Lightroom I use them rename option Rename to → “Custom name (= my own name) - Original File Number”. 

The problem: All the images that have only stayed in LR do what they are told to name-wise. However, the images that have been in Photoshop change file name during export (remember, in LR they had kept their original file name efter being in PS - just with .Edit added). That means that images that wa only in LR are named for instance: “Simon_Walsh_[original file number]. BUT… the images that have been in PS and then back to be exported from LR (via the “save” button in PS) start from 1 as file name. That means the order of the images get all mixed around which is quite frustrating if I go and upload them to a client online galleri for selection. 

All help is  much, much appreciated - thanks in advance 🙏

As in the advice from @dj_paige the correct method is to always [Save] from Ps.

You can create a Filename PRESET in the Filename Template Editor, that you use for renaming Photoshop edits-

(The default is {Filename-Edit.TIF/PSD} ) (Or you can be more specific if you only ever use Ps as an external editor)

Use the Rename Preset in the Preferences > External Editors tab

Then when you [SAVE] the file (can be done by [Ctrl+W] which also closes the Ps file) it returns to Lightroom-Classic, next to and in the same folder as the original image-

I recommend you approach this completely the other way round: use Lightroom (Classic) as your front-end, for sometimes taking images out to PS and back.

This can be done multiple independent times if you do require differently editable PS files to be made. All you then have to do, is hit Save within PS: the other technicalities just take care of themselves. One of the options available is Edit Original as Copy, which when applied to an image which (say) has a PS edited PSD as its source file, generates a full duplicate of that PSD with all its layers on disk, immediately auto-imports this back into LrC as a new image version, while opening the file in PS so you can then vary that and then Save. 

However Lightroom Classic does make it very easy and efficient to explore multiple creative treatments virtually, to the extent those treatments can be executed in that way. This requires no saving of any additional file copies.

[As an example you might send a Raw based photo out to PS for retouching (in full colour and uncropped, say), and then take the resulting new image version back in LrC, and start making virtual copies. These copies can be given varying B&W conversions, colour treatments, local adjustments etc inside Lightroom Classic and all of this will derive from the same single underlying PSD / TIF. So if you go back into PS to improve some skin flaws or clone something additional - content related stuff - then by doing so and Saving, you are automatically updating what underlies all of those varying virtual treatments - which each exists as an independently editable and manageable thumbnail within the Catalog.] 

So it is worth considering IMO whether usage of PS ought to focus only on the tasks that have to happen there, and plan around that. I'd summarise this class of PS-exclusive tasks, as "picture content alteration".

LrC can then take full care of all "picture appearance adjustment", also of library management and organisation whether physical or virtual, and of all output. It's true that PS can also do many of these other things itself, but there is good reason to disregard all that IMO when you have got LrC to take that strain. So you'd not apply any output specific PPI or crop within PS, but instead, leave this working PSD as output-neutral as possible.

The idea being, for it to then make no significance difference (so far as its practical usage) whether a given image version seen within the Catalog is Raw-based or not; also, whether PS has ever been involved in it (or not); also whether it is a virtual copy or not; it can serve equally well regardless, for any output usage you may want.

Second question, a  separate  question.

I assume you are starting with a raster, not a RAW image in LrC?

Ok, you are on purpose going against normal practice and  select "save as" in PS as to create a new file with a different name. And you are not surprised when you bring up LrC that the new photo is not in the catalog. Ok

Now as to get that photo into the LrC catalog, you do what? Be specific.

I would start an import, I would select the folder PS saved that photo in, and I would probably select ADD, not Copy or Copy as DNG. But, what are you doing? Heck One could accomplish this via sync (folder )

Do you use the Lightroom Classic command "Edit In ..." ? If so, you should not be using Save As, you should be using Save.

If you are not using the Lightroom Classic command "Edit In..." then you should start, in Photoshop do a Save (not Save As) and then your problems should be gone.