diff --git a/scum_programmer/programmer/scum.py b/scum_programmer/programmer/scum.py
index f799d7b..c3c952a 100644
--- a/scum_programmer/programmer/scum.py
+++ b/scum_programmer/programmer/scum.py
@@ -47,7 +47,7 @@ def _send_command(self, msg: str, command: bytes):
         """Send a command to the SCuM."""
         pos = 0
         _command = hdlc_encode(command)
-        while (pos % USB_CHUNK_SIZE) == 0 and pos < len(_command):
+        while pos < len(_command):
             self.serial.write(_command[pos : pos + USB_CHUNK_SIZE])
             self.serial.flush()
             pos += USB_CHUNK_SIZE
diff --git a/scum_programmer/programmer/serial.py b/scum_programmer/programmer/serial.py
index f44b3aa..4194a30 100644
--- a/scum_programmer/programmer/serial.py
+++ b/scum_programmer/programmer/serial.py
@@ -5,7 +5,7 @@
 
 def get_default_port():
     """Return default serial port."""
-    ports = [port for port in list_ports.comports()]
+    ports = sorted([port for port in list_ports.comports()])
     if sys.platform != "win32":
         ports = [port for port in ports if "J-Link" == port.product]
     if not ports:
diff --git a/sdk/bsp/rftimer.c b/sdk/bsp/rftimer.c
index a4e0d9b..ef15144 100644
--- a/sdk/bsp/rftimer.c
+++ b/sdk/bsp/rftimer.c
@@ -26,7 +26,7 @@ static rftimer_vars_t rftimer_vars = { 0 };
 static bool delay_completed[NUM_INTERRUPTS] = { 0 };          // flag indicating whether the delay has
                                                               // completed. For use by
                                                               // delay_milliseoncds_synchronous method
-static bool is_repeating[NUM_INTERRUPTS] = { 0 };             // flag indicating whethere each COMPARE
+static bool is_repeating[NUM_INTERRUPTS] = { 0 };             // flag indicating whether each COMPARE
                                                               // will repeat at a fixed rate
 static unsigned int timer_durations[NUM_INTERRUPTS] = { 0 };  // indicates length each COMPARE
                                                               // interrupt was set to run for.