In Indesign CS 5.5 , I find strang issue on my File. I created table with single text frame, end of table, notes was there (Out side of table). When I add the below space to table through Table Option, The notes went to overset text. Though I have enlarged the text frame, not worked, Later I clicked the oversert icon and created new textframe placed then the notes appear. when I delete the text frame again text gone to sit in the exact place.
What is the accual Issue?
Your setup looks very simple and should not cause issue however I think the issue is Space After value , if this value exceeds so that the text couldn't be accomodated in InDesign then it will be overset.
Making the new text frame will fix it as there will be enough space.
What if you reduce the Space after value to "0" , does the text appears below the table or is it still overset ?
Would like to see the screen shot (with Hidden character enabled) of the pages with and without issue, to understand it better.