asyncio semaphore and wait task ordering patterns

Consider the following code for managing concurrency with identical async tasks

import asyncio

async def performTask(id):

  await asyncio.sleep(1)
  print(id)


async def runBatchItem(semaphore, task):
  await semaphore.acquire()
  await task
  semaphore.release()


async def main():

  # all tasks
  tasks = [performTask(i) for i in range(20)]

  # concurrency handler
  MAX_CONCURRENT = 3
  semaphore = asyncio.Semaphore(value=MAX_CONCURRENT)
  stasks = [runBatchItem(semaphore, task) for task in tasks]

  await asyncio.wait(stasks)


asyncio.run(main())

No matter how often I run it, I always end up with the following sequence of outputs

3 19 4 5 6 7 8 17 9 10 11 12 13 0 14 1 15 2 16 18

• Question 1. What is the logic to this ordering of my tasks?
• Question 2. What if I want the tasks to be processed in approximate insert order? I.e, like working through a queue with limited concurrency.

Thanks in advance!