The thing is that in my example. I removed removed the plug from the kasa app so that it erases all the info on the kasa app and then set it to the new device. When this was done it was showing the old device as on in sense but with different wattage.
I then removed the device again from kasa and then disabled the integration as suggested. When I did this it erased the stats in Sense for my other HS110 plugs and the HS300 would not get detected, only the two HS110s… after several disables and enables of the integration, it finally got all my three TPLINK devices but all the stats in sens were gone even for the devices i did not want to reset.
There should be a a re-scan button on the tp-link integration part and a remove button on a per smart plug device in my opinion.