in layout mode, DoubleClick the first portal, take away the checkmark from "Reset scroll bar when exiting record".
Thanks for the idea, this is already unchecked and still the behaviour is the same, which makes it all the more odd.
Both portals have active scroll bars, alternate and active row state and script triggers which fire only on modification.
Actually, this works, but you only see the visual effect on the second portal, because you cannot have two portal rows selected at the same time.
However, when I then tell it to change objects and go to the last record of the Listings Portal AFTER the previous step, the effect of the previous step is removed as if nothing has happened
Not exactly; if the first portal must scroll to activate the last record, that position will be maintained; there simply is no highlight.