“Thing” says to me that ST recognized something but it’s not sure what it is, so do what @Automated_House recommends and manually change the device type. More than likely ST doesn’t know the “fingerprint” of your device, hence the “Thing” thing… Send us a link to the product too please.
EDIT: Is it this one? https://www.ebay.com/i/192898072246?chn=ps
If so, definitely change the device type to “ZigBee Switch”. If the device reports Watts usage, change the device type to “ZigBee Switch Power”.