P: Sync from previous photo crops the image

Ok, your previous post to the screenshot says you cropped: 

Your instructions earlier said:

1. First picture in sequence is 8256x5504 pixels (same with all the others)
2. I make exposure adjustment to the first image.
3. I use "Synchronize Settings" to copy that adjustment to all the other pics.

Using your earlier instructions can you replicate (without the crop)?

Here is screenshot of Sync Settings dialog box.

A screenshot of that dialog would be nice if you could provide one. 

I reset preferences at start-up (Opt + Shft).  I cropped one image and then copied the settings to others in the focus stack and everything appeared correctly.  I thought that solved it.  However, I reset all files and tried it again and the first image was different by one pixel compared to all the images the settings were copied to.  I repeated this 4 times and the problem still persists.  The Synchronized Settings dialog box has all boxes checked except Upright mode and Process version were grayed out.

With your test files, I am not able to reproduce the behavior. After sync the images remain identically sized. 

A screenshot of your Sync dialog might be helpful.

Have you reset your preferences?

Okay, Rikk.  I'm ready.  I can send the files to you via WeTransfer.  I just need an email address.  This is what I did.  I took three images from the beginning of a stack sequence and sent them to you as "original" files and I labelled them Original-1, Original-2 and Original-3.  I named the side cars the same.  I then took the Original-1 image in Lr and changed the exposure and cropped it.  The original file size is 8256x5504. The cropped dimensions are 7914x5307.  I highlighted Original-1, shift-clicked Original-2 and Original-3 and then Synced them with the adjustments made on Original-1.  Both synced image files are sized 7913x5308.  One pixel smaller on the long side and one pixel larger on the short side.  I deleted these exported files and exported the files again from Lr as DNGs, just as a double check.  The source image exported as 7914x5307.  The synced files exported as 7913x5307.  That's weird.  The same export operation and now different results. I did it a third time and the synced files again exported one pixel smaller on the long side.  Just for the heck of it I exported the files as full size JPGs.  The synced files are now 7912 pixels on the long side, two pixels smaller.  I repeated this again and same result - 2 pixels smaller on the long side.  Then I exported as TIFF and they mimicked the JPG results.  So JPG and TIFF are still different than the exported DNG files.  I'm ready to send you the originals and DNGs when you are ready.  If you also want the TIFF and JPG I can send those too.

Bruce

I think we will need some sample files from you. I think 3 would be sufficient. 

Prepare 3 originals with no edits

With the same files create the issue and export those three as DNGs. When you have the six files ready, let me know here how to get them (CC Files, Dropbox, etc)

Yes, using the "I" key shows the same dimensions as the EXIF data.  I shot and ran more focus stacks this morning and I'm seeing the same anomoly.

If you use the [ I ] key to turn on Info does Lightroom report the pixel dimensions the same as EXIF or different?

Using these instructions,  I was not able to reproduce the issue

@Rikk

1. Using PC, current ver. Lr and Nikon D850
2.  Shot a sequence of pictures using D850 focus shift feature for stacking
3. Download into Lr
4. First picture in sequence is 8256x5504 pixels (same with all the others)
5. I make exposure adjustment to the first image.
6. I use "Synchronize Settings" to copy that adjustment to all the other pics.
7. I look at the EXIF data and the first image (source for adjustments) is 8256x5504 pixels for Dimensions and Cropped values.
8. All the other images are Cropped value of 8254x5504.  Two pixels shorter on the long side.
9. Having the source image with different dimensions than the rest of the images causes a problem with a program like Zerene Stacker.
10. Zerene will only stack a series of images if they are all EXACTLY the same size.
11. It happens like this even when you make adjustments other than size.  When I crop and Sync Settings the same thing happens.  The first image is always one or two pixels larger in one dimension.
12. I hope this helps.