There's no problem calling pastie.get multiple times

Code:
alias pastie.test {
  pastie.get http://pastie.org/pastes/9077474
  pastie.get http://pastie.org/pastes/9077475
  pastie.get http://pastie.org/pastes/9077479
}


The problem is you're using the same global %output variable instead of passing the output to pastie.get when you call it. You can specify a file or folder for output.

/pastie.get url output