What problem(s) are you trying to solve here? If you're trying to convince yourself that free data on the Internet is not fully trustworthy, then you have already succeded hundredfold. If you're trying to verify the details of Brown-Forman's 2018 split (more precisely, stock dividend), then start with their fy 2018 10K, fortunately recent enough to be free on Edgar:
Note 10 Common Stock
On May 26, 2016, our Board of Directors approved a two-for-one stock split for our Class A and Class B common stock, subject to stockholder approval of an amendment to our Restated Certificate of Incorporation.
The stock split, which was effected as a stock dividend, resulted in the issuance of one new share of Class A common stock for each share of Class A common stock outstanding and one new share of Class B common stock for each share of Class B common stock outstanding. The new shares were distributed on August 18, 2016, to shareholders of record as of August 8, 2016.
On January 23, 2018, our Board of Directors approved a stock split, effected in the form of a stock dividend. For every four shares of either Class A or Class B common stock held, shareholders of record as of the close of business on February 7, 2018, received one share of Class B common stock, with any fractional shares payable in cash. The additional shares and cash for fractional shares were distributed to stockholders on February 28, 2018.