Fix register member and contribution bugs

app/controllers/contributions_controller.rb

@@ -20,6 +20,7 @@ class ContributionsController < ApplicationController
       if @contribution.save
         @member.handle_new_contribution(@contribution, params.dig(:contribution, :overriden_expires_on))
         @member.reset_status!
+        @member.regenerate_notifications
 
         redirect_to @member, notice: "Contribution was successfully created."
       else

app/controllers/members_controller.rb

@@ -25,7 +25,7 @@ class MembersController < ApplicationController
 
   # POST /members
   def create
-    @member = Member.new(member_params)
+    @member = Member.new(member_params.merge(number: Member.maximum(:number) + 1))
 
     if @member.save
       @member.reset_status!