If you define nothing for the end of the excerpt nothing is outputted. If you define ” ” the output is ” …”. If you define e.g. “continue” the output is ” … continue” and “continue” is linked to the post. In Addition you may define a button.
WPSP list behaviour:
“…” is outputed at the end of the excerpt. You may define a text but the WPSP Outputs a button.
To get a consistent behaviour I define ” ” using GP and I changed the function in WPSP to Output ” …”. Thus I achieved the same behaviour.
I hope this clarifies the suggestion.