cluster rebalanced after add still reports being non-balanced

Created an attachment (id=265)
diag report inlcuding logs

Steps to duplicate:

1) Install node A
2) Install node B clustering to A, rebalance
3) Remove node B from the cluster, rebalance
4) Initialize node B as a single node
5) Add Node A through the "add server" dialogue on node B, rebalance

The UI reports Fail Over Warning: Your system is missing replicants until you rebalance

Note this is because the cluster is reporting it is not balanced:
{
"name":"default",
"nodes":[{
"clusterMembership":"active",
"status":"healthy",
"hostname":"10.1.3.113",
"version":"1.6.0a_206_gdd8a5cd",
"os":"x86_64-unknown-linux-gnu",
"ports":

{ "proxy":11211, "direct":11210 }

,
"otpNode":"ns_1@10.1.3.113",
"otpCookie":"mkmaajhwhiwxfqmy",
"uptime":"3295",
"memoryTotal":1051709440,
"memoryFree":165675008,
"mcdMemoryReserved":0,
"mcdMemoryAllocated":0
},{
"clusterMembership":"active",
"status":"healthy",
"hostname":"10.1.3.115",
"version":"1.6.0a_206_gdd8a5cd",
"os":"x86_64-unknown-linux-gnu",
"ports":

{ "proxy":11211, "direct":11210 }

,
"otpNode":"ns_1@10.1.3.115",
"otpCookie":"mkmaajhwhiwxfqmy",
"uptime":"3271",
"memoryTotal":1051774976,
"memoryFree":97296384,
"mcdMemoryReserved":0,
"mcdMemoryAllocated":0
}],
"buckets":

{ "uri":"/pools/default/buckets" }

,
"controllers":{
"addNode":

{ "uri":"/controller/addNode" }

,
"rebalance":

{ "uri":"/controller/rebalance" }

,
"failOver":

{ "uri":"/controller/failOver" }

,
"reAddNode":

{ "uri":"/controller/reAddNode" }

,
"ejectNode":

{ "uri":"/controller/ejectNode" }

,
"testWorkload":

{ "uri":"/pools/default/controller/testWorkload" }

},
"balanced":false,
"rebalanceStatus":"none",
"rebalanceProgressUri":"/pools/default/rebalanceProgress",
"stopRebalanceUri":"/controller/stopRebalance",
"stats":

{ "uri":"/pools/default/stats" }

}