diff --git a/src/helium.jl b/src/helium.jl
index c7c3a77..ecb388c 100644
--- a/src/helium.jl
+++ b/src/helium.jl
@@ -129,7 +129,7 @@ function anneal!(ρᵣ::AbstractMatrix{T}, Teq::DenseVector{T}, dt::Number, tste
         @turbo @. ρᵣ[i,1:i] = 1 / ((dm.C0 + dm.C1 * (log(dt + Teqᵢ) - dm.C2) / lᵢ)^(1/dm.beta) + 1)
     end
 
-    # Guenthner et al conversion volume-length conversion
+    # Guenthner et al volume-length conversion
     rmr0 = dm.rmr0
     scale = 1/(1-rmr0)
     @fastmath @inbounds for j ∈ 1:ntsteps
diff --git a/src/inversion.jl b/src/inversion.jl
index c6a9683..5a349e8 100644
--- a/src/inversion.jl
+++ b/src/inversion.jl
@@ -217,7 +217,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
 
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, k, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, k, dt) && maxdiff(Tstepsₚ) < dTmax
                     break
                 end
                 if attempt == nattempts
@@ -245,7 +245,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
 
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, npointsₚ, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, npointsₚ, dt) && maxdiff(Tstepsₚ) < dTmax
                     break
                 end
                 if attempt == nattempts
@@ -578,7 +578,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
 
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, k, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, k, dt) && maxdiff(Tstepsₚ) < dTmax
                     if pointsininterval(agepointsₚ, npointsₚ, detail.agemin, detail.agemax) >= enoughpoints
                         break
                     end
@@ -608,7 +608,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
 
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, npointsₚ, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, npointsₚ, dt) && maxdiff(Tstepsₚ) < dTmax
                     break
                 end
                 if attempt == nattempts
@@ -955,7 +955,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
 
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, k, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, k, dt) && maxdiff(Tstepsₚ) < dTmax
                     if pointsininterval(agepointsₚ, npointsₚ, detail.agemin, detail.agemax) >= enoughpoints
                         break
                     end
@@ -985,7 +985,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
 
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, npointsₚ, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, npointsₚ, dt) && maxdiff(Tstepsₚ) < dTmax
                     break
                 end
                 if attempt == nattempts
@@ -1351,7 +1351,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
     
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, k, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, k, dt) && maxdiff(Tstepsₚ) < dTmax
                     break
                 end
                 if attempt == nattempts
@@ -1379,7 +1379,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
     
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, k, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, k, dt) && maxdiff(Tstepsₚ) < dTmax
                     break
                 end
                 if attempt == nattempts
@@ -1405,7 +1405,7 @@
                 linterp1s!(Tstepsₚ, knot_index, ages, temperatures, agesteps)
     
                 # Retry unless we have satisfied the maximum reheating rate
-                if isdistinct(agepointsₚ, npointsₚ, k, 2dt) && maxdiff(Tstepsₚ) < dTmax
+                if isdistinct(agepointsₚ, npointsₚ, k, dt) && maxdiff(Tstepsₚ) < dTmax
                     break
                 end
                 if attempt == nattempts
diff --git a/src/utilities.jl b/src/utilities.jl
index 00759af..4d4c31f 100644
--- a/src/utilities.jl
+++ b/src/utilities.jl
@@ -62,7 +62,7 @@
     # Check if point k is distinct from other points in list within ± δ
     function isdistinct(points::DenseArray, npoints::Int, k::Int, δ::Number)
         @inbounds for i = 1:npoints
-            if i!=k && abs(points[i] - points[k]) < δ
+            if i!=k && abs(points[i] - points[k]) <= δ
                 return false
             end
         end