Suppose I'm the developer of a chrome extension (which indeed I am) that is up on the web store and that I want to answer the review of one the users.
Now, if I add/edit my review my previous post gets overridden (even if I AM the developer), making my efforts in helping users useless.
Is there something I'm missing, or is it how it currently works without any way to prevent this from happening?
All reviews on the Chrome Web Store are from Google+ users now. Your best option is to click through to their profile and either send them an email, send them a message, or share a post with them. The first two are more direct and likely to get noticed but there isn't much else you can do.