Different folder file sizes and number of files

hi there
i am a registered dopus user
when i copied the complete contents of a folder from one window to another using the commander type interface, the target directory is showing that it has double the number of files and double the total folder file size compared to the source folder. the number of files and total file size of the target directory is clearly the correct one, but i am wondering what kind of bug this is, because the content is absolutely identical and i hovered over each folder in both directories and got the same total size and number of folders but the problem is when i did a properties.
is this a directory opus problem or a windows 10 problem

hope to hear from you
best wishes

Where are you seeing those counts?

Could we see a screenshot or video of what happens?

Does the same happen if you do the operation using Explorer?