In the stake pool list in Daedalus Rewards, there are multiple tiles that have the same ticker. Also, sometimes the tiles with the same ticker have exactly the same information in the details pop-up which appears when you click on the tile.
This is the ticker:
Metadata (and by extension, tickers), identify stake pool owners, not stake pools. On the Shelley Incentivized Testnet, a single stake pool owner can run multiple stake pools. Just as a retail store might have multiple outlets operating under the same brand name, the ticker is associated with the owner. Unfortunately, due to technical limitations, it is not possible to have a ticker based on the stake pool; we can only display a ticker based on stake pool owner. Therefore it is not possible to show any stake pool ticker in the user interface in Daedalus Rewards.
The Daedalus user interface on the Shelley Incentivized Testnet displays tickers to show you the operators to which you can delegate your stake. However, in the case of a stake pool operator running multiple pools, there is currently no way to identify exactly the pool to which you are delegating. Instead, you should select your pool based on the performance and the reputation of the operator, and factors such as whether the pool is close to saturation or not.
See also Daedalus Rewards - Known Issues