Got an idea and found a hint.
In the code I have this:
<td class="actors" width= "104"><a href="http://www.imdb.com/name/$$ITEM_EXTRA_U ... IPTION</td>
This explains why all actors URLs aren't URLs but just the last bit... in the database. The template holds the first part. No idea why is like that.
Also it doesn't explain why until now the script imported only the last bit. Beats me.
What can I do now to fix the situation?
I wish I could export and import only the extras but I already tried and doesn't work with the images. I vaguely remember that once you explained to me how to do this part.