diff --git a/app.py b/app.py
index 09039b9..81ebac3 100644
--- a/app.py
+++ b/app.py
@@ -269,8 +269,8 @@ def logout():
     return redirect(url_for('index'))
 
 # Job storage
-JOBS_FILE = os.path.join(os.path.dirname(__file__), 'jobs.json')
-RESULTS_DIR = 'results'
+JOBS_FILE = os.path.abspath(os.path.join(os.path.dirname(__file__), 'jobs.json'))
+RESULTS_DIR = os.path.abspath('results')
 os.makedirs(RESULTS_DIR, exist_ok=True)
 
 processing_complete = False
@@ -443,7 +443,7 @@ def jobs():
     jobs = load_jobs()
     print(f"Loaded {len(jobs)} jobs: {list(jobs.keys())}")
     # Sort jobs by timestamp, newest first
-    sorted_jobs = sorted(jobs.values(), key=lambda x: str(x.get('timestamp', '')), reverse=True)
+    sorted_jobs = sorted(jobs.values(), key=lambda x: x.get('timestamp', datetime.min), reverse=True)
     print(f"Sorted jobs count: {len(sorted_jobs)}")
     if sorted_jobs:
         print(f"First job: {sorted_jobs[0].get('id')} status: {sorted_jobs[0].get('status')}")