Multiple logins for a given url/site - usage question

I’ve got multiple logins saved for a website.

My use case is to open the Firefox extension and go to the VAULT and launch the entry I’m interested in.

I’m finding that the extension launches the url and then auto-fills with the last entry that was used - not the one that I just clicked on. Doesn’t matter which entry you click on in the VAULT using the same url - the fields on the page will be filled with values from the last entry.

Can someone explain to me why that makes more sense than auto-filling with the entry that was just clicked on?