I believe (firmly) that those accounts are connected but DT1/2 members, usually refuse to leave ratings unless there's enough evidence that connects them (ex. Address connections and etc...).
Most likely the following accounts, are connected as well (creation date - there might be some other connections as well):
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billykannithiDate Registered: September 20, 2017, 12:38:42 PM
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roshanfiousDate Registered: September 20, 2017, 12:37:56 PM
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bayupermanaDate Registered: September 20, 2017, 12:39:45 PM
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fadlyzuldDate Registered: September 20, 2017, 01:53:36 PM