diff --git a/pennylane/devices/qtcorgi_helper/apply_operations.py b/pennylane/devices/qtcorgi_helper/apply_operations.py
index 71c9a42edf5..7a16f054efa 100644
--- a/pennylane/devices/qtcorgi_helper/apply_operations.py
+++ b/pennylane/devices/qtcorgi_helper/apply_operations.py
@@ -134,7 +134,7 @@ def get_CNOT_matrix(_param):
 
 
 def apply_single_qubit_unitary(state, op_info):
-    wires, param = op_info["wires"][:0], op_info["params"][0]
+    wires, param = op_info["wires"][:1], op_info["params"][0]
     kraus_mat = jax.lax.switch(op_info["type_indices"][1], single_qubit_ops, param)
     return apply_operation_einsum(kraus_mat, wires, state)
 
@@ -146,37 +146,36 @@ def apply_two_qubit_unitary(state, op_info):
 
 
 def apply_single_qubit_channel(state, op_info):
-    wires, param = op_info["wires"][:0], op_info["params"][0]
+    wires, param = op_info["wires"][:1], op_info["params"][0]
     kraus_mats = [jax.lax.switch(op_info["type_indices"][1], single_qubit_channels, param)]
     return apply_operation_einsum(kraus_mats, wires, state)
 
 
 qubit_branches = [apply_single_qubit_unitary, apply_two_qubit_unitary, apply_single_qubit_channel]
 
-single_qutrit_ops_subspace_0 = [None, None, None, lambda _param: qml.THadamard.compute_matrix()]
-single_qutrit_ops_subspace_1 = [
+single_qutrit_ops_subspace_01 = [
     qml.TRX.compute_matrix,
     qml.TRY.compute_matrix,
     qml.TRZ.compute_matrix,
-    partial(qml.THadamard.compute_matrix, subspace=[0, 1]),
+    lambda _param: qml.THadamard.compute_matrix(subspace=[0, 1]),
 ]
-single_qutrit_ops_subspace_2 = [
+single_qutrit_ops_subspace_02 = [
     partial(qml.TRX.compute_matrix, subspace=[0, 2]),
     partial(qml.TRY.compute_matrix, subspace=[0, 2]),
     partial(qml.TRZ.compute_matrix, subspace=[0, 2]),
-    partial(qml.THadamard.compute_matrix, subspace=[0, 2]),
+    lambda _param: qml.THadamard.compute_matrix(subspace=[0, 2]),
 ]
-single_qutrit_ops_subspace_3 = [
+single_qutrit_ops_subspace_12 = [
     partial(qml.TRX.compute_matrix, subspace=[1, 2]),
     partial(qml.TRY.compute_matrix, subspace=[1, 2]),
     partial(qml.TRZ.compute_matrix, subspace=[1, 2]),
-    partial(qml.THadamard.compute_matrix, subspace=[0, 2]),
+    lambda _param: qml.THadamard.compute_matrix(subspace=[0, 2]),
 ]
 single_qutrit_ops = [
-    single_qutrit_ops_subspace_0,
-    single_qutrit_ops_subspace_1,
-    single_qutrit_ops_subspace_2,
-    single_qutrit_ops_subspace_3,
+    lambda _op_type, _param: qml.THadamard.compute_matrix(),
+    lambda op_type, param: jax.lax.switch(op_type, single_qutrit_ops_subspace_01, param),
+    lambda op_type, param: jax.lax.switch(op_type, single_qutrit_ops_subspace_02, param),
+    lambda op_type, param: jax.lax.switch(op_type, single_qutrit_ops_subspace_12, param),
 ]
 
 two_qutrits_ops = [qml.TAdd.compute_matrix, qml.adjoint(qml.TAdd).compute_matrix]
@@ -189,9 +188,9 @@ def apply_single_qubit_channel(state, op_info):
 
 
 def apply_single_qutrit_unitary(state, op_info):
-    wires, param, subspace_index = op_info["wires"][:0], op_info["params"][0], op_info["params"][1]
-    mat_funcs = jax.lax.switch(subspace_index, single_qutrit_ops, param)
-    kraus_mats = [jax.lax.switch(op_info["type_indices"][1], mat_funcs, param)]
+    wires, param = op_info["wires"][:1], op_info["params"][0]
+    subspace_index, op_type = op_info["params"][1], op_info["type_indices"][1]
+    kraus_mats = [jax.lax.switch(subspace_index, single_qutrit_ops, op_type, param)]
     return apply_operation_einsum(kraus_mats, wires, state)
 
 
@@ -202,7 +201,7 @@ def apply_two_qutrit_unitary(state, op_info):
 
 
 def apply_single_qutrit_channel(state, op_info):
-    wires, params = op_info["wires"][:0], op_info["params"]  # TODO qutrit channels take 3 params
+    wires, params = op_info["wires"][:1], op_info["params"]  # TODO qutrit channels take 3 params
     kraus_mats = [jax.lax.switch(op_info["type_indices"][1], single_qutrit_channels, *params)]
     return apply_operation_einsum(kraus_mats, wires, state)
 
diff --git a/pennylane/devices/qutrit_mixed/simulate.py b/pennylane/devices/qutrit_mixed/simulate.py
index edbf74fb6df..3fcabca670d 100644
--- a/pennylane/devices/qutrit_mixed/simulate.py
+++ b/pennylane/devices/qutrit_mixed/simulate.py
@@ -74,7 +74,7 @@ def get_qutrit_final_state_from_initial(operations, initial_state):
         elif len(wires) == 1:
             ops_type_indices[0].append(0)
             ops_type_indices[1].append([qml.TRX, qml.TRY, qml.TRZ, qml.THadamard].index(type(op)))
-            subspace_index = op.subspace.index([None, (0, 1), (0, 2), (1, 2)])
+            subspace_index = [None, (0, 1), (0, 2), (1, 2)].index(op.subspace)
             if ops_type_indices[1][-1] == 3:
                 params = [0, subspace_index, 0]
             else: