It always pays to read the small print ( if any) that appears at the bottom of such tables.
For example, in the DomPost's listing, supplied by Craigs, it notes :
"Dividend (CPS). Dividend Cents per Share over the last 12 months excluding imputation credits"
ie, it doesn't exclude any special dividend nor does it claim to be a forecast of ongoing dividends.
"Dividend yield. Dividend CPS as a proportion of the current share price."
Again, purely a historical statistic.
Take care and DYOR!