diff --git a/docker-compose.alt.yml b/docker-compose.alt.yml
index adcbffc..56f9760 100644
--- a/docker-compose.alt.yml
+++ b/docker-compose.alt.yml
@@ -27,8 +27,8 @@ services:
       - PORT=4321
       - PUBLIC_BETTER_AUTH_URL=${PUBLIC_BETTER_AUTH_URL:-http://localhost:4321}
       # Optional concurrency controls (defaults match in-app defaults)
-      - MIRROR_ISSUE_CONCURRENCY=${MIRROR_ISSUE_CONCURRENCY:-3}
-      - MIRROR_PULL_REQUEST_CONCURRENCY=${MIRROR_PULL_REQUEST_CONCURRENCY:-5}
+      - MIRROR_ISSUE_CONCURRENCY=${MIRROR_ISSUE_CONCURRENCY:-1}
+      - MIRROR_PULL_REQUEST_CONCURRENCY=${MIRROR_PULL_REQUEST_CONCURRENCY:-1}
       
     healthcheck:
       test: ["CMD", "wget", "--no-verbose", "--tries=3", "--spider", "http://localhost:4321/api/health"]
diff --git a/docker-compose.yml b/docker-compose.yml
index 00d8cd0..f981486 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -47,8 +47,8 @@ services:
       - PRESERVE_ORG_STRUCTURE=${PRESERVE_ORG_STRUCTURE:-false}
       - ONLY_MIRROR_ORGS=${ONLY_MIRROR_ORGS:-false}
       - SKIP_STARRED_ISSUES=${SKIP_STARRED_ISSUES:-false}
-      - MIRROR_ISSUE_CONCURRENCY=${MIRROR_ISSUE_CONCURRENCY:-3}
-      - MIRROR_PULL_REQUEST_CONCURRENCY=${MIRROR_PULL_REQUEST_CONCURRENCY:-5}
+      - MIRROR_ISSUE_CONCURRENCY=${MIRROR_ISSUE_CONCURRENCY:-1}
+      - MIRROR_PULL_REQUEST_CONCURRENCY=${MIRROR_PULL_REQUEST_CONCURRENCY:-1}
       - GITEA_URL=${GITEA_URL:-}
       - GITEA_TOKEN=${GITEA_TOKEN:-}
       - GITEA_USERNAME=${GITEA_USERNAME:-}
diff --git a/docs/ENVIRONMENT_VARIABLES.md b/docs/ENVIRONMENT_VARIABLES.md
index d69b139..58cbad4 100644
--- a/docs/ENVIRONMENT_VARIABLES.md
+++ b/docs/ENVIRONMENT_VARIABLES.md
@@ -141,6 +141,10 @@ Control what content gets mirrored from GitHub to Gitea.
 | `MIRROR_PULL_REQUESTS` | Mirror pull requests (requires MIRROR_METADATA=true) | `false` | `true`, `false` |
 | `MIRROR_LABELS` | Mirror labels (requires MIRROR_METADATA=true) | `false` | `true`, `false` |
 | `MIRROR_MILESTONES` | Mirror milestones (requires MIRROR_METADATA=true) | `false` | `true`, `false` |
+| `MIRROR_ISSUE_CONCURRENCY` | Number of issues processed in parallel. Set above `1` to speed up mirroring at the risk of out-of-order creation. | `1` | Integer ≥ 1 |
+| `MIRROR_PULL_REQUEST_CONCURRENCY` | Number of pull requests processed in parallel. Values above `1` may cause ordering differences. | `1` | Integer ≥ 1 |
+
+> **Ordering vs Throughput:** Metadata now mirrors sequentially by default to preserve chronology. Increase the concurrency variables only if you can tolerate minor out-of-order entries.
 
 ## Automation Configuration