You need to add in the extension 3 times so that you get BluetoothLE1, BluetoothLE2 & BluetoothLE3.
You now have 3 BLE objects to work with.
Need to work sequentially.
Start with one of them to scan for devices. Select device and connect etc.
Now start 2nd one to scan for devices, select device and connect.
Similarly with the 3rd.
In block view make sure to select the right BluetoothLE# object each time otherwise things wont work