About thumbnails

Hello, and happy new year everyone <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=4391&image=1&table=forumtopics' class='bbc_emoticon' alt=':)' />
I have read the manual, but due to my limited knowledge still am not able to reproduce the thumbnail option.
what actually happens is that I create a field named "picture" and format it to be an OLE object

use it in ASP runner and it displays picture perfectly.
however,

If I use same field "picture" formatted same way, but then try to add the thumbnail option, I am being asked to add another field.
Ok, done,

now I have two fields:
picture --OLe object

file--- Ole object
when additng a thumbnail option to the "file" field I get "picture" in the dropdown.

but when adding a thumbnail option to the "picture" I only get "file" as a storage.
somehow, I get both fields displayed initially(later I just removed "picture" from the view table)

and it doesn't matter where I "browse: file or picture, both are dispalyed with the same size.

Even though I have corrected the thumbnail size as well, to be 80
Please let me know if this is a good place to ask this question.
thank you