@pinging in comments is a bit complicated. There's a full description on Meta Stack Overflowfull description on Meta Stack Overflow.
What's probably happening in this case is this:
- The first author of the question or answer will always be notified of any new comment. There is no need to use @name to notify them. (You may still use it for clarity, if needed; however if only you and the author have been commenting on the post so far, the @name will be automatically removedautomatically removed from the beginning of the comment, as it adds no value.)