I Know What You Did Last Summer/Headscratchers

The sequel titles.
If the first one (1997) was I Know What You Did Last Summer, then the second (1998) should've been  I Still Know What You Did Two Summers Ago, and the third something like ''I'll Always Know What You Did Three...Um, '96 Was It? Yeah, Three Summers Ago''.
 * The execs apparently gave a pretty weak BS response to people questioning the title of the second, and as for the third, it had Willis going after new characters, who were unrelated to the events of the first two.