Version Report Discrepancies (uname -a and freebsd-version)

Why are there occasional discrepancies in what is reported as the
running version?

After a recent upgrade I get 13.4-RELEASE-p1 as response to uname -a
but 13.4-RELEASE-p2 as response to freebsd-version .

When the upgrade completed I was told -p1 was installed,
when I ran freebsd-update fetch I was told no updates
were available or needed to run -p2.

Do some patches only register with some programs and not others?

-=-=-
The World Trade Center towers MUST rise again,
at least as tall as before...or terror has triumphed.