I think it's not possible to combine both features (picture and scrollbars). An alternatively might be to use an extension for it, for example the website/iFrame extension (should be by the native Qlik extensions) or something like the customized textbox from Stefan Walter. Another way would be just to display these data within a table and/or to show these information in another way - most data seems to be quite redundant.
Vertical Scrollbar: If this check box is marked a vertical scroll bar will be added to the text object when its text content is too long to be displayed within the given area.
The text in your case should not be too long as it is just your text to point to the location of the image... Hopefully this makes sense as far as explanation of why things are behaving as they are...
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