Strange, they should look much better then.We used it on both of her entire legs.
Back then my first intents using Vaseline were not really successful as it does not creep deep enough under the scales to smother all the mites and their eggs.
Then I switched to Ballistol Animal spray without any further issues.

The link you provided does go to a Ballistol Product but it is a lubricating product used for firearms, wood, leather, hardware knives - very likely not the same product you are using on your bird's legs.