-R option is for replacing rules, not for moving it. You want to make delete and then insert in proper position, like:
iptables -D INPUT 1
iptables -I INPUT 2 -s 10.0.0.2 -j DROP
iptables -A INPUT -s 10.0.0.2 -j DROP
As these are probably only temporary, you need to change position of these rules in your firewall configuration file, where they are loaded at boot.