Yes , i thought i would be difficult to explain, but thank you for trying to understand. i will try to explain again...
open new post
try to use (wrong) img link from photobucket
enter (wrong) img l;ink into post
post preview shows no images (of course) so i select entire post text and copy it (text is saved in buffer memory)
delete first post
open new post and try again
try to use correct link from photobucket
try to paste link to post but text editor pastes all post text only not the link from p.b.
after several tries i realise text editor buffer is not refreshed when i select items from p.b but it is refreshed selecting other text from within the post editing window
So , no problem, if i have to delete a post i will start again from the beginning and not try to save the text. Now i have found that the 'Direct' p.b. link works i will use that and I am able to post fine.
thank you for your efforts