Does my wife need to file for removal of a conditional restriction on
her permanent resident status--because she may not have conditional
status?  In other words, did she get lucky and jumped straight to
permanent resident without a conditional restriction?  See below for
fact situation.  I would like to see some type official government
info for this, such as a citation to a USCIS publication, Federal
register, case law citation, or something similar that provides a
legal basis for the answer.

My wife entered the US on a K-1 fiancee visa.  We were married within
the 90 day period and then applied for the Adjustment of Status (AOS);
we had the AOS interview about 6 months after the marriage.  My wife
then received a 10-year Permanent Resident Card after the AOS
interview instead of a 2-year card, which was a surprise.

The Permanent Resident Card says "Category IR6". One web site said
that a fiancee should be placed into the CF1 category (conditional
fiancee), so I am assuming that her card should say "Category CF1".
Another web site said that both IR1 and IR6 were "spouse of US
citizen", which seems appropriate. Help? I looked for a list of these
categories all over the USCIS web site and the internet without
success (apparently, they are top secret codes--one web site said that
they are extremely difficult to find). Any help with these codes? I
was thinking that maybe she got lucky and is not conditional, and we
would not need to apply to remove her conditional status. Now, I am
thinking that we got a problem that will take a lawyer to fix.