I think you just have changed to much / too often.
For the Change of pool to take effect you have to wait 4 blocks - which can be an hour or 2, so just be Patient.
During this time you will get the red lined error message in the miner window, telling you that your rewards reciepent doesnt match the pool adress.
Finally Change once again for your desired pool and wait 1-2 hours and Problem should be sorted out. hth
Make sure you put the correct values in both text fields when changing pool - the below value is the BURST adress of the pool you want to mine at - after clicking "Change" it will be in your clipboard, so just paste it from there.
The above text field is your passphrase only you know.