Primary Node listminers shows everything as local:true

Question

Two of these addresses are not local - unless the islocal does not mean what it appears to?
Only the first node (admin permissions) shows this as all true, the other nodes show it correctly.

[
    {
        "address" : "1C8AAD",
        "islocal" : true,
        "permitted" : true,
        "diversitywaitblocks" : 0,
        "lastmined" : null,
        "chainstate" : "mining-permitted",
        "localstate" : "other-local-address-preferred"
    },
    {
        "address" : "1En1g",
        "islocal" : true,
        "permitted" : true,
        "diversitywaitblocks" : 1,
        "lastmined" : 11187,
        "chainstate" : "waiting-mining-diversity",
        "localstate" : "waiting-mining-diversity"
    },
    {
        "address" : "1aXHY",
        "islocal" : true,
        "permitted" : true,
        "diversitywaitblocks" : 2,
        "lastmined" : 11188,
        "chainstate" : "waiting-mining-diversity",
        "localstate" : "waiting-mining-diversity"
    },
    {
        "address" : "1Yjcr4",
        "islocal" : true,
        "permitted" : true,
        "diversitywaitblocks" : 3,
        "lastmined" : 11189,
        "chainstate" : "waiting-mining-diversity",
        "localstate" : "waiting-mining-diversity"
    }
]

Answer 1

Unless you used importaddress API, this means "this node has private key for this address", so it can mine blocks and sign them using this address. It is allowed for several nodes to have private key for the same address, but it is not recommended, because it can cause various problems (not only in mining)

As for importaddress - it is minor bug (it should be reported as false). We will fix it in the next version.