@Mathewp Hello, 
Nowadays devices could roam to a stronger WiFi signal by itself after it connects to RE and remember the credentials: 
You could try to set up a separate SSID for RE which is different from router's SSID, and later forget router's Wi-Fi on your devices like laptops or phones:
( change Wireless settings via Tether APP) https://www.tp-link.com/support/faq/1373/

Remove WiFi  profile on computer: 
https://www.tp-link.com/support/faq/918/

Forget WiFi on the photo: Go to Settings-> WiFi on your phone, Tap (or Long press  the router's WiFi name  ->Forget / Delete the network