Authlogic sends the wrong activation code - ruby-on-rails

Question

Update: this question has been answered (see below). I'll leave it up in case anyone can benefit in the future.
I am trying to get e-mail confirmations working on Authlogic using Rails 3. http://github.com/matthooks/authlogic-activation-tutorial
Authentication is working and the activation e-mails are being generated and sent, each containing a perishable token, but the perishable tokens are incorrect, in that they do not match the one saved in the user's record.
Upon following the token in the e-mail, I get: Exception in ActivationsController#create
Note: When I manually enter the correct token from the table into the URL, it validates and redirects as it is supposed to. Therefore, the only issue is that the perishable token being generated is not the same as the one being saved.
# UserMailer
class UserMailer < ActionMailer::Base
default :from => "notifications#myapp.com"
def registration_confirmation(user)
#user = user
mail(:to => "#{user.login} <#{user.email}>", :subject => "Registered")
end
def activation_instructions(user)
subject "Activate Your Account"
from "noreply#myapp.com"
recipients user.email
sent_on Time.now
body :account_activation_url => activate_url(user.perishable_token)
end
def welcome(user)
subject "Welcome to the site!"
from "noreply#myapp.com"
recipients user.email
sent_on Time.now
body :root_url => root_url
end
end
# E-mail itself:
To activate, click here: <%= #account_activation_url %>
The error is occurring on line 5 where the system tries and fails to find User by token:
class ActivationsController < ApplicationController
before_filter :require_no_user
def create
#user = User.find_by_perishable_token(params[:activation_code], 1.week) || (raise Exception)
raise Exception if #user.active?
if #user.activate!
flash[:notice] = "Your account has been activated!"
UserSession.create(#user, false) # Log user in manually
#user.deliver_welcome!
redirect_to home_url
else
render :controller => "welcome", :action => "linklogin"
end
end
end

Answer 1

It's funny - sometimes the process of asking the question itself reveals the answer.
In my users#create, there are different user types, and the action sets a couple of values after the initial validated save and saves the simple changes again without validation.
My e-mail was being sent in between the first and second saves, so of course by the time the user clicks on the activation e-mail, the perishable_token has already been reset.
I moved the mailing down to after the second save, and now the activation e-mail works perfectly.
Thank you very much for any time you've spent considering this problem. :)
Cirrus