Two schedulers can have the same name, it is weird to have though.
Also not sure the second scheduler is totally correct. At least it can be written better.
See: http://forum.mikrotik.com/t/radius-server-not-working-in-2-8-11/127/1
The “Attacks” chain is a custom chain, take a look at the jump rules further down.
/ip firewall filter
#...
add action=jump chain=input comment="Check for bad stuff in \"Attack\" chain" jump-target=Attacks
#...
add action=jump chain=forward comment="Check for bad stuff in \"Attack\" chain" jump-target=Attacks
You can read more here: https://wiki.mikrotik.com/wiki/Manual:IP/Firewall/Filter
The firewall shown in the first post is just an example, you might want you edit it for your own use or make your own.