After you edit a RAW file in ACR, it produces a small .xmp (sidecar) file which is used by ACR to re-open the same RAW with the settings you used to develop it last time. It will be in the same directory as the original RAW.
It will use that 'sidecar' file again even if opened in ACR7. Try renaming the sidecar file temporarily so that ACR7 doesn't recognise it. ACR7 will now open the RAW with the ACR7 contols you mentioned instead of the previous ACR controls. HOWEVER, it will not use your previous slider settings now.