diff --git a/rowers/courseutils.py b/rowers/courseutils.py
index d864e372..1badc1fa 100644
--- a/rowers/courseutils.py
+++ b/rowers/courseutils.py
@@ -41,7 +41,7 @@ def time_in_path(df,p,maxmin='max',getall=False,name='unknown',logfile=None):
         if logfile is not None:
             t = time.localtime()
             timestamp = time.strftime('%b-%d-%Y_%H%M', t)
-            with open(logfile,'a') as f:
+            with open(logfile,'ab') as f:
                 f.write('\n')
                 f.write(timestamp)
                 f.write(' ')
@@ -65,7 +65,7 @@ def time_in_path(df,p,maxmin='max',getall=False,name='unknown',logfile=None):
     if logfile is not None:
         t = time.localtime()
         timestamp = time.strftime('%b-%d-%Y_%H%M', t)
-        with open(logfile,'a') as f:
+        with open(logfile,'ab') as f:
             f.write('\n')
             f.write(timestamp)
             f.write(' ')
diff --git a/rowers/tasks.py b/rowers/tasks.py
index 4363f7f6..b30bfd2f 100644
--- a/rowers/tasks.py
+++ b/rowers/tasks.py
@@ -198,7 +198,7 @@ def handle_strava_sync(stravatoken,workoutid,filename,name,activity_type,descrip
             e = sys.exc_info()[0]
             t = time.localtime()
             timestamp = time.strftime('%b-%d-%Y_%H%M', t)
-            with open('stravalog.log','a') as f:
+            with open('stravalog.log','ab') as f:
                 f.write('\n')
                 f.write(timestamp)
                 f.write(str(e))
@@ -446,7 +446,7 @@ def handle_check_race_course(self,
     try:
         entrytimes,entrydistances = time_in_path(rowdata,paths[0],maxmin='max',getall=True,
                                                  name=polygons[0].name,logfile=logfile)
-        with open(logfile,'a') as f:
+        with open(logfile,'ab') as f:
             t = time.localtime()
             timestamp = time.strftime('%b-%d-%Y_%H%M', t)
             f.write('\n')
@@ -471,7 +471,7 @@ def handle_check_race_course(self,
     endseconds = []
 
     for startt in entrytimes:
-        with open(logfile,'a') as f:
+        with open(logfile,'ab') as f:
             t = time.localtime()
             timestamp = time.strftime('%b-%d-%Y_%H%M', t)
             f.write('\n')
@@ -594,17 +594,19 @@ def handle_check_race_course(self,
         engine.dispose()
 
         # add times for all gates to log file
-        with open(logfile,'a') as f:
+        with open(logfile,'ab') as f:
             t = time.localtime()
             f.write('\n')
             f.write(timestamp)
             f.write(' ')
             f.write('--- LOG of all gate times---')
 
-        for path,polygon in (paths,polygons):
+        for path,polygon in zip(paths,polygons):
             ( secs,meters,completed) = coursetime_paths(rowdata2,
-                                                        [path],[polygon],logfile=logfile)
-
+                                                        [path],polygons=[polygon],logfile=logfile)
+            with open(logfile,'ab') as f:
+                line = " time: {t} seconds, distance: {m} meters".format(t=secs,m=meters)
+                f.write(line)
 
         # send email
         handle_sendemail_coursefail(
diff --git a/rowers/views/importviews.py b/rowers/views/importviews.py
index 10573f7f..a512eca1 100644
--- a/rowers/views/importviews.py
+++ b/rowers/views/importviews.py
@@ -1036,26 +1036,19 @@ def garmin_deregistration_view(request):
     if request.method != 'POST':
         return HttpResponse(status=200)
 
-    t = time.localtime()
-    timestamp = time.strftime('%b-%d-%Y_%H%M', t)
-    with open('garminlog.log','a') as f:
-        f.write('\n')
-        f.write(timestamp)
-        f.write(' ')
-        f.write(str(request.body))
-
     data = json.loads(request.body)
-    try:
-        garmintoken = data['userAccessToken']
-    except KeyError:
-        print(data)
-        return HttpResponse(status=200)
-    try:
-        r = Rower.objects.get(garmintoken=garmintoken)
-        r.garmintoken = ''
-        r.save()
-    except Rower.DoesNotExist:
-        return HttpResponse(status=200)
+    deregistrations = data['deregistrations']
+    for deregistration in deregistrations:
+        try:
+            garmintoken = deregistration['userAccessToken']
+            try:
+                r = Rower.objects.get(garmintoken=garmintoken)
+                r.garmintoken = ''
+                r.save()
+            except Rower.DoesNotExist:
+                pass
+        except KeyError:
+            pass
 
     return HttpResponse(status=200)