Your simulation may have been not properly stopped. Try starting a simulation again and stopping it with the "stop" button.
If this doesn't fix anything, simply reboot your device.
Android may retrieve the real location by using some complex internal mechanism. Try deactivating the wifi if it's possible in your use-case.
You can also ty to increase mock location interval in Lockito's settings
Please review the issue tracker and look for your problem. If you can't find it there, please open a new issue