Make sure you use same factors and costs for all connections made. If these are not the same, then this is exactly what you can see - multiple stratums being alive and ready to serve work.
Please advise, where I'm wrong. f=Numbers are my Mhs:
"pools": [
{
"name": "NH x11 multi",
"url" : "stratum+tcp://stratum.nicehash.com:4336",
"user" : "***",
"pass": "f0=0;f2=0;f3=145;f4=117;f5=0;f6=101;f7=455",
"profile": "x11"
},
{
"name": "NH x13 multi",
"url" : "stratum+tcp://stratum.nicehash.com:4337",
"user" : "***",
"pass": "f0=0;f2=0;f3=145;f4=117;f5=0;f6=101;f7=455",
"profile": "x13"
},
{
"name": "NH x15 multi",
"url" : "stratum+tcp://stratum.nicehash.com:4339",
"user" : "***",
"pass": "f0=0;f2=0;f3=145;f4=117;f5=0;f6=101;f7=455",
"profile": "x15"
},
{
"name": "NH Nist5 multi",
"url" : "stratum+tcp://stratum.nicehash.com:4340",
"user" : "***",
"pass": "f0=0;f2=0;f3=145;f4=117;f5=0;f6=101;f7=455",
"profile": "nist5"
},
{
"name": "NH x11",
"url" : "stratum+tcp://stratum.nicehash.com:3336",
"user" : "***",
"pass": "x",
"profile": "x11"
},
{
"name": "NH x13",
"url" : "stratum+tcp://stratum.nicehash.com:3337",
"user" : "***",
"pass": "x",
"profile": "x13"
},
{
"name": "NH x15",
"url" : "stratum+tcp://stratum.nicehash.com:3339",
"user" : "***",
"pass" : "x",
"profile": "x15"
},
{
"name": "NH Nist5",
"url" : "stratum+tcp://stratum.nicehash.com:3340",
"user" : "***",
"pass" : "x",
"profile": "nist5"
}
]