Another reason, according to J. D. Biersdorfer of New York Times, was that deleted tweets may still be cached away and therefore available to show up in search results  until the site goes indexing again and updates itself with a fresh copy of your Twitter profile and posts.
Sababu nyingine, kwa mujibu wa  J. D. Biersdorfer wa New York Times, ni kwamba twiti zilizofutwa zinaweza kuwa bado zinapatikana na hivyo kuonekana kwenye matokeo ya utafutaji mtandaoni  mpaka tovuti ihuishwe na nakala mpya ya twiti kwenye ukurasa mkuu wa akaunti husika.