confusing action and id in link_to_remote

I have a problem I have seen on several posts here but nowhere have I
found a solution. If I call the action edit in a link_to_remote call,
id and action are confused. If I instead call edit2 as action it works
fine. I find that strange!

The call:
<%= link_to_remote index_tablerow.full_name, :url => { :controller =>
'horses', :action => 'edit', :id => index_tablerow.id } %>

results in (authenticity_token removed):
Parameters: {"action"=>"6", "id"=>"edit", "controller"=>"horses",
"_"=>""}
ActionController::UnknownAction (No action responded to 6. Actions:
create, destroy, edit, edit2, index, new, show, and update):

But the call:
<%= link_to_remote index_tablerow.full_name, :url => { :controller =>
'horses', :action => 'edit2', :id => index_tablerow.id } %>

results in:
Processing HorsesController#edit2 (for 127.0.0.1 at 2010-01-10
12:13:30) [POST]
  Parameters: {"action"=>"edit2", "id"=>"6", "controller"=>"horses",
"_"=>""}

My routs:
  map.connect ':controller/:action/:id'
  map.connect ':controller/:action/:id.:format'