well actually you can make them as hard as you want.. there can be as many as you want, you just have to keep adding a sound in every time. but the most common are single, double, triple and quadrouple :)
theres two kinds of time steps though.. there's the standard kind..
(shuffle-hop step flap-step) single
(shuffle-hop flap flap-step) double
(shuffle-hop shuffle-step flap-step) triple
there isn't normally a quadrouple for that one though..
the other kind is like this
(spank-hop step flap stomp stomp) single
(spank-hop flap flap stomp stomp) double
(spank-hop shuffle-step flap stomp stomp) triple
i can't remember the quadrouples like how to spell them out because i have to be doing them.. sorry but theres the two kinds of time steps and i'm not sure which ones you do!
and i'm not sure what you're talking about with the pick ups? but if you give me more info i might be able to help you out