OK,
I did it again.
One working button. ok
Copy the same without any chances: second button working fine
copy once more: 3rd button working fine,

BUT

now the second button doesn't work anymore.
There must be a error in the script.
I use the PayPal buttons from BV.

What do you mean with
"I usually put my button and code in a seperate html box
and then copy the html box to wherever I need it"

1) Are you using the code generation from PayPal itself or do you mean the Paypal buttons from BV?
2) when you have two html boxes, how do you do it with the linking?

thanks for your help.
Dorothea