Not sure to which cross you're referring, but your correct about the Maltese
being symbolic of the Eight Beatitudes.
"Maltese Cross: associated with the Knights of St. John (also known as the "Hospitallers of St. John of Jerusalem" or simply "Knights of Malta"), this Cross's 8 points are said to symbolize the 8 Beatitudes and the Beatitudes' associated obligations. The Order of St. John ran hostels and hospitals for Christian pilgrims to Jerusalem, but eventually had to fight during the wars of Islamic aggression. It is said that the Maltese Cross is a symbol within a symbol in that it is made of the initial letters of the Greek words for, "Jesus Christ, God, Son, Savior" ("Iesous Christos Theou Huios Soter"), which forms the acrostic for the word "fish." When these letters -- ï‰ïƒï‘ï•ï“-- (Iota, Chi, Theta, Upsilon, Sigma) are stacked on top of each other and their "ends" closed, they form a Maltese Cross." From.