diff --git a/main.c b/main.c
index 42f0b7b..73606b3 100644
--- a/main.c
+++ b/main.c
@@ -892,13 +892,13 @@ config_t config = {
   .low_level_offset =       100,    // Uncalibrated
   .high_level_offset =      100,    // Uncalibrated
 #ifdef TINYSA3
-  .low_correction_frequency = { 10000, 100000, 200000, 500000, 50000000, 140000000, 200000000, 300000000, 330000000, 350000000 },
+  .low_correction_frequency = { 10000, 100000, 200000, 500000, 30000000, 140000000, 200000000, 300000000, 330000000, 350000000 },
   .low_correction_value = { +6.0, +2.8, +1.6, -0.4, 0.0, -0.4, +0.4, +3.0, +4.0, +8.1 },
   .high_correction_frequency = { 240000000, 280000000, 300000000, 400000000, 500000000, 600000000, 700000000, 800000000, 900000000, 960000000 },
   .high_correction_value = { 0, 0, 0, 0, 0.0, 0, 0, 0, 0, 0 },
 #endif
 #ifdef TINYSA4
-  .low_correction_frequency = { 10000, 100000, 200000, 500000, 50000000, 140000000, 200000000, 300000000, 330000000, 350000000 },
+  .low_correction_frequency = { 10000, 100000, 200000, 500000, 30000000, 140000000, 200000000, 300000000, 330000000, 350000000 },
   .low_correction_value = { 0, 0, 0, 0, 0.0, 0, 0, 0, 0, 0 },
   .high_correction_frequency = { 10000, 100000, 200000, 500000, 50000000, 140000000, 200000000, 300000000, 330000000, 350000000 },
   .high_correction_value = { 0, 0, 0, 0, 0.0, 0, 0, 0, 0, 0 },
diff --git a/sa_cmd.c b/sa_cmd.c
index d8986cc..083ec73 100644
--- a/sa_cmd.c
+++ b/sa_cmd.c
@@ -226,6 +226,7 @@ VNA_SHELL_FUNCTION(cmd_leveloffset)
       config.high_level_offset = v;
     else
       goto usage;
+    dirty = true;
   } else {
   usage:
     shell_printf("leveloffset [low|high] [<offset>]\r\n");