O2 sensors and p0430

[Quadragin]

We have a 05 GX got the p0430 bank 2 catalyst....

replaced all 4 o2 sensors

but my numbers are really weird

any help would be great 

I have attached images from AutoEnginuity . make not of idle and 2000rpms

bank 2 is running 300F cooler

[Lexus Owners Club]

It looks like there may be air leaks in the exhaust system causing excess oxygen levels before the cats/lambda's

Best way to prove/eliminate this is to measure the oxygen levels in the exhaust gases....should be as close to zero reading at idle/cruise