diff --git a/dandi/download.py b/dandi/download.py
index e375a60c1..c6ba78ea2 100644
--- a/dandi/download.py
+++ b/dandi/download.py
@@ -1088,7 +1088,21 @@ def _check_attempts_and_sleep(
     attempts_allowed: int,
     downloaded_in_attempt: int = 0,
 ) -> int | None:
-    """Check if we should retry the download, sleep if still allowed,
+    """
+    Check if we should retry the download, sleep if still allowed,
+    and return potentially adjusted 'attempts_allowed'
+
+    :param path: Destination of the download
+    :param exc: Exception raised during the last download attempt
+    :param attempt: The index of the last download attempt
+    :param attempts_allowed: The number of download attempts currently allowed
+    :param downloaded_in_attempt: The number of bytes downloaded in the last attempt
+
+    :returns: The number of download attempts allowed, potentially adjusted, if download
+        should be retried. None if download should not be retried.
+        Note: If download should be retried, this function sleeps before returning. 
+        otherwise, it returns immediately.
+    """
     and return potentially adjusted 'attempts_allowed'
     """
     sleep_amount: float | None = None
@@ -1107,7 +1121,7 @@ def _check_attempts_and_sleep(
             )
             attempts_allowed += 1
     if attempt >= attempts_allowed:
-        lgr.debug("%s - download failed after %d attempts: %s", path, attempt, exc)
+        lgr.debug("%s - download failed after %d attempts: %s", path, attempt + 1, exc)
         return None
     if exc.response is not None:
         if exc.response.status_code not in (
diff --git a/dandi/utils.py b/dandi/utils.py
index 7084ca586..a5c3fbc16 100644
--- a/dandi/utils.py
+++ b/dandi/utils.py
@@ -919,7 +919,7 @@ def get_retry_after(response: requests.Response) -> Optional[int]:
             # and continue with "if_unparsable" sleep logic
             sleep_amount = None
             lgr.warning(
-                "response %d has incorrect date in Retry-After=%r: %s. " "Returning %r",
+                "response %d has incorrect date in Retry-After=%s: %s. Returning %r",
                 response.status_code,
                 retry_after,
                 exc_ve,
@@ -937,7 +937,7 @@ def get_retry_after(response: requests.Response) -> Optional[int]:
         elif sleep_amount < 0:
             sleep_amount = None
             lgr.warning(
-                "date in Retry-After=%r is in the past (current is %r). "
+                "date in Retry-After=%s is in the past (current is %r). "
                 "Returning %r",
                 retry_after,
                 current_date,
@@ -946,7 +946,7 @@ def get_retry_after(response: requests.Response) -> Optional[int]:
         elif sleep_amount > 7 * 24 * 60 * 60:  # week
             sleep_amount = None
             lgr.warning(
-                "date in Retry-After=%r is over a week in the future (current is %r). "
+                "date in Retry-After=%s is over a week in the future (current is %r). "
                 "Returning %r",
                 retry_after,
                 current_date,