First off, there's nothing to do with the 1.1 Patch. That fixed the Luminose City glitch,
Now, for your PokeRadar question. If you are in a chain, DO NOT press the PokeRadar again, as it will turn off. This resets the chain. When you defeat/catch the Pokemon in a chain, you automatically see more grass shaking. Walk into the grass and you will find either the same Pokemon, or something that breaks the chain (different Pokemon, nothing in grass). Simple as that.
Side Note: Don't use Roller Skates, as you can't even activate it in the first place with Roller Skates on.