Olgar Shiverstone
Legend
It is completely unnecessary to add the bonus action portion unless it is granting an extra bonus action. Whether it is badly written by adding something that is unnecessary and confusing, or it is badly written because it put the extra bonus action in the wrong portion of the sentence, we can agree it is badly written.
As adding something completely irrelevant to a sentence is a much less frequent mistake than putting it in the wrong place in a sentence I'm inclined to think the intent is you get an additional bonus action.
Actually, it is necessary to phrase the abilities that way. An ability that uses a bonus action is granting the bonus action. Unlike a move or an action, a character does not have a bonus action every turn -- a character only has a bonus action if he or she uses an ability which grants a bonus action.
It's a fine distinction, but important because it prevents gaining an additional bonus action. There's no such thing as an additional, because the character never had one in the first place. You can get an additional action (e.g. Action Surge), but not an additional bonus action.