In end of suttas you can see that instead of accepting refuge in Buddha, Dhamma and Sangha, they accept refuge in Gotama, Dhamma and Bhikkhusangha. Namely next formula: “Esāhaṃ bhavantaṃ gotamaṃ saraṇaṃ gacchāmi dhammañca bhikkhusaṅghañca.” Same formula in Chinese agama.
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Could you elaborate more on why exactly is it strange? 
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