ktadd then principal's password no longer works?

[Jeff Blaine]

Again, I must really not understand something.  This
principal's password is getting trashed after I use
ktadd

% sudo kadmin -p admin/admin
Authenticating as principal admin/admin with password.
Password for admin/admin at FOO.COM:
kadmin:  ktadd -k admin.kt admin/admin
Entry for principal admin/admin with kvno 9, encryption type Triple DES 
cbc mode with HMAC/sha1 added to keytab WRFILE:admin.kt.
Entry for principal admin/admin with kvno 9, encryption type DES cbc 
mode with CRC-32 added to keytab WRFILE:admin.kt.
kadmin:  quit

% sudo kadmin -p admin/admin
Authenticating as principal admin/admin with password.
Password for admin/admin at FOO.COM:
kadmin: Incorrect password while initializing kadmin interface

^^^ tried many times -- had to fix via kadmin.local