You may notice issues “When importing new keywords without a broad match type defined by using a CSV file or directly pasting it into the multiple changes dialog, a broad match type with the default bid of the ad group may inadvertently be created.” As a workaround, if you do not wish to have a broad bid for a keyword, please make sure to explicitly delete any broad match type which you do not wish to bid for prior to submitting your changes to adCenter. Carefully review your bids before submitting them, until a fix is released, said adCenter blog.