time_t st_atime; /* time of last access */
long st_atimensec; /* nsec of last access */
time_t st_mtime; /* time of last data modification */
long st_mtimensec; /* nsec of last data modification */
time_t st_ctime; /* time of last file status change */
long st_ctimensec; /* nsec of last file status change */
You're probably confused about "ctime".
-Arun