I believe the system was just updated to reflect the new Integrated Reasoning section. This also provided an opportunity to allow users to submit multiple (up to four) GMAT administrations' worth of scores through the ApplyYourself system.
Generally speaking, AdCom will look across your various subscores to get a sense of what you are capable of achieving. More often than not, AdCom will note your highest subscore performances. At the same time, AdCom will also note and observe trends, high variances, etc.
One should disclose all still-valid scores.
Hope this helps!