If that's true then the artificer continues to get ridiculous.
In addition, an artificer gains a bonus feat at 4th level and every four levels thereafter (8th, 12th, 16th, and 20th). For each of these bonus feats, the artificer must choose a metamagic feat or a feat from the following list: Attune Magical Weapon, Craft Construct (see the Monster Manual, page 303), Exceptional Artisan, Extra Rings, Extraordinary Artisan, Legendary Artisan, Wand Mastery.
Not every class has an iron clad restriction on their bonus feats, so If you want to go with that interpretation as to how they work then take it up with your DM. Though I am inclined to agree with Meiliken as that being how it works, it is very dangerous water to tread into.