diff --git a/bin/coverage_report_single.py b/bin/coverage_report_single.py
index 800a657f..eadd3bc9 100644
--- a/bin/coverage_report_single.py
+++ b/bin/coverage_report_single.py
@@ -597,7 +597,7 @@ def style_cov_summary(self):
             - cov_summary (df): df of gene coverage stats
             - threshold_cols (list): list of threshold values
         Returns:
-            - gene_stats (str): HTML formatted str of gene summary df
+            - gene_stats (list): HTML formatted str of gene summary df
             - total_genes (int): total number of genes
         """
         # rename columns for displaying in report
@@ -632,7 +632,7 @@ def style_snps_cov(self, snps_cov):
         Args:
             - snps_cov (df): df of snps above / below threshold
         Returns:
-            - snps_cov (str): list of snps to render in report
+            - snps_cov (list): list of snps to render in report
             - total_snps (int): total number of snps in df
         """
         if not snps_cov.empty:
@@ -667,15 +667,11 @@ def style_snps_no_cov(snps_no_cov):
         Args:
             - snps_no_cov (df): df of snps with no coverage values
         Returns:
-            - snps_no_cov (str): list of snps for rendering in report
+            - snps_no_cov (list): list of snps for rendering in report
             - snps_out_panel (int): total number snps with no cov
         """
         # if variants from vcf found that span exon boundaries
         if not snps_no_cov.empty:
-            # manually add div and styling around rendered table, allows
-            # to be fully absent from the report if the table is empty
-            snps_no_cov.index = np.arange(1, len(snps_no_cov) + 1)
-
             # get number of variants to display in report
             snps_out_panel = len(snps_no_cov.index)
 
diff --git a/data/templates/single_template.html b/data/templates/single_template.html
index 2b24a274..fd545ea6 100644
--- a/data/templates/single_template.html
+++ b/data/templates/single_template.html
@@ -344,7 +344,7 @@ <h2> Coverage of Known Variants </h2>
         // $total_snps is int passed from report script, set to JS snp_check var on writing to template to check against
         var snp_check = $total_snps
         if (snp_check == 0) { 
-        document.getElementById('snps').style.display = "none";  
+            document.getElementById('snps').style.display = "none";  
         }
     </script>
 
@@ -354,7 +354,7 @@ <h2> Coverage of Known Variants </h2>
         // $exon_issues is int passed from report script
         var exon_check = $exon_issues
         if (exon_check == 0) { 
-        document.getElementById('low_exon_plots').style.display = "none";  
+            document.getElementById('low_exon_plots').style.display = "none";  
         }
     </script>
 
@@ -367,11 +367,12 @@ <h2> Coverage of Known Variants </h2>
         for (i = 0; i < coll.length; i++) {
         coll[i].addEventListener("click", function() {
             this.classList.toggle("active");
+
             var content = this.nextElementSibling;
-            if (content.style.maxHeight){
-            content.style.maxHeight = null;
+                if (content.style.maxHeight) {
+                    content.style.maxHeight = null;
             } else {
-            content.style.maxHeight = content.scrollHeight * 2 + "px";
+                content.style.maxHeight = content.scrollHeight * 2 + "px";
             } 
         });
         }