diff --git a/keyboards/3w6/rev1/matrix.c b/keyboards/3w6/rev1/matrix.c
index af3d21067..ae2f96bfa 100644
--- a/keyboards/3w6/rev1/matrix.c
+++ b/keyboards/3w6/rev1/matrix.c
@@ -34,7 +34,7 @@ extern i2c_status_t tca9555_status;
 // All address pins of the tca9555 are connected to the ground
 // | 0  | 1  | 0  | 0  | A2 | A1 | A0 |
 // | 0  | 1  | 0  | 0  | 0  | 0  | 0  |
-#define I2C_ADDR 0b0100000
+#define I2C_ADDR (0b0100000 << 1)
 
 // Register addresses
 #define IODIRA 0x06  // i/o direction register
diff --git a/keyboards/3w6/rev2/matrix.c b/keyboards/3w6/rev2/matrix.c
index 0fc0322b6..c47c24e1d 100644
--- a/keyboards/3w6/rev2/matrix.c
+++ b/keyboards/3w6/rev2/matrix.c
@@ -34,7 +34,7 @@ extern i2c_status_t tca9555_status;
 // All address pins of the tca9555 are connected to the ground
 // | 0  | 1  | 0  | 0  | A2 | A1 | A0 |
 // | 0  | 1  | 0  | 0  | 0  | 0  | 0  |
-#define I2C_ADDR 0b0100000
+#define I2C_ADDR (0b0100000 << 1)
 
 // Register addresses
 #define IODIRA 0x06  // i/o direction register
@@ -192,6 +192,7 @@ static matrix_row_t read_cols(uint8_t row) {
                 // do nothing
                 return 0;
             } else {
+                port0 = ~port0;
                 // We read all the pins on GPIOA.
                 // The initial state was all ones and any depressed key at a given column for the currently selected row will have its bit flipped to zero.
                 // The return value is a row as represented in the generic matrix code were the rightmost bits represent the lower columns and zeroes represent non-depressed keys while ones represent depressed keys.
@@ -247,7 +248,7 @@ static void select_row(uint8_t row) {
                 default:                    break;
             }
 
-            tca9555_status = i2c_writeReg(I2C_ADDR, OREGP1, &port1, 2, I2C_TIMEOUT);
+            tca9555_status = i2c_writeReg(I2C_ADDR, OREGP1, &port1, 1, I2C_TIMEOUT);
             // Select the desired row by writing a byte for the entire GPIOB bus where only the bit representing the row we want to select is a zero (write instruction) and every other bit is a one.
             // Note that the row - MATRIX_ROWS_PER_SIDE reflects the fact that being on the right hand, the columns are numbered from MATRIX_ROWS_PER_SIDE to MATRIX_ROWS, but the pins we want to write to are indexed from zero up on the GPIOB bus.
         }
diff --git a/keyboards/handwired/dactyl/dactyl.h b/keyboards/handwired/dactyl/dactyl.h
index fe45d1668..b901b6767 100644
--- a/keyboards/handwired/dactyl/dactyl.h
+++ b/keyboards/handwired/dactyl/dactyl.h
@@ -6,7 +6,7 @@
 #include "i2c_master.h"
 #include <util/delay.h>
 
-#define I2C_ADDR        0b0100000
+#define I2C_ADDR        (0b0100000 << 1)
 #define I2C_TIMEOUT     100
 #define IODIRA          0x00            // i/o direction register
 #define IODIRB          0x01
diff --git a/keyboards/sx60/sx60.h b/keyboards/sx60/sx60.h
index 2c0aa8240..605b6fe78 100755
--- a/keyboards/sx60/sx60.h
+++ b/keyboards/sx60/sx60.h
@@ -7,7 +7,7 @@
 #include <util/delay.h>
 
 /* I2C aliases and register addresses (see "mcp23018.md") */
-#define I2C_ADDR        0b0100000
+#define I2C_ADDR        (0b0100000 << 1)
 #define I2C_TIMEOUT     100
 #define IODIRA          0x00            /* i/o direction register */
 #define IODIRB          0x01