False positive in quere results

Hi and thanks for your work!
In the tab “search & replace”, searching for “string.aaa.111” (is an example ?? ) give the results like:
“1 table was processed. 51 cells need to be updated.”
But if i search the same table by phpmyadmin, I can’t find the string “string.aaa.111”.
Clicking “View details” popup:
“Table: wp_sometinginvented Columns Changes: 51
Row Column Old value New value”
but no rows.
This is strange.
No server or plugin cache.
Cau you explain?
Thanks in advance.
If you need details, just ask.