fixing a few issues with add_to_existing flag

main.py

@@ -129,6 +129,7 @@ def run_checks(opts):
         logging.info("Existing html page has been given without specifying "
                      "--add_to_existing flag. This is probably and error and so "
                      "manually adding --add_to_existing flag")
+    if opts.add_to_existing and opts.existing:
         for i in glob(opts.existing+"/config/*"):
             opts.config.append(i)
         for i in glob(opts.existing+"/html/*_corner.html"):
@@ -159,7 +160,7 @@ def copy_files(opts):
     # copy over the config file
     for num, i in enumerate(opts.config):
         if opts.webdir not in i:
-            shutil.copyfile(i, opts.webdir+"/config/%s" %(i.split("/")[-1]))
+            shutil.copyfile(i, opts.webdir+"/config/"+opts.approximant[num]+"_"+i.split("/")[-1])
     for num, i in enumerate(opts.samples):
         if opts.webdir not in i:
             shutil.copyfile(i, opts.webdir+"/samples/"+opts.approximant[num]+"_"+i.split("/")[-1])