Dude it started in 1956 so we start from there again your wrong
Yes, it started in 1956 by Tomas Cloma. But it was only in 1972, Philippine gov publicly expanded its sovergnty over the island he "discovered".
Quote from the link I provided:
Jun 1959--"Cloma learned that some Taiwanese merchants were selling phosphates which had come from Freedomland in Japan. He went to Japan to find out whether it was true and later said that the merchants could have got to one of his islands unobserved. He threatened bloodshed, mentioning ominously that a hundred-strong crew on his fishing boats had side-arms and home-made bombs. He seemed to have spoken to Serrano and Garcia about the affair, without tangible results."
1960--"Cloma initiated agreements with a Hong Kong company for the exploitation of Freedomland's resources and suggested that the Philippines regard Freedomland imports as coming from a foreign country, which should help prevent smuggling. The Government took no action".
In all these "anti-smuggling" activities, philippine gov didn't do anything or say anthing. In other words, Philippine gov didn't treat these island "discovered" by Cloma as its own land at the time.