diff --git a/src/scgenerator/threading.py b/src/scgenerator/threading.py
index 4c17398..830e198 100644
--- a/src/scgenerator/threading.py
+++ b/src/scgenerator/threading.py
@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import multiprocessing
-import sys
 from collections.abc import Iterable, Iterator
 from dataclasses import dataclass
 from enum import Enum, auto
@@ -107,12 +106,8 @@ class PositionGetter:
         self.offset = offset
         self.busy_at = [False for _ in range(n)]
 
-    @property
-    def max_pos(self) -> int:
-        return max(self.busy_at)
-
     def book(self) -> int:
-        for pos, busy in enumerate(self.busy_at[: self.remaining]):
+        for pos, busy in enumerate(self.busy_at):
             if not busy:
                 self.busy_at[pos] = True
                 self.remaining -= 1
@@ -129,7 +124,7 @@ class MultibarThread(Thread):
 
     def __init__(
         self,
-        n_bars: int,
+        n_tasks: int,
         n_show: int,
         queue: Queue,
         default_total: int | float | None = None,
@@ -138,9 +133,9 @@ class MultibarThread(Thread):
         super().__init__()
         self.queue = queue
 
-        pos_getter = PositionGetter(n_bars, n_show, offset=1)
+        pos_getter = PositionGetter(n_tasks, n_show, offset=1)
 
-        self.sub_pbars = [DelayedTqdm(pos_getter, total=default_total) for _ in range(n_bars)]
+        self.sub_pbars = [DelayedTqdm(pos_getter, total=default_total) for _ in range(n_tasks)]
         self.main_pbar = tqdm(
             total=sum((bar.total or 0) for bar in self.sub_pbars),
             position=0,