diff --git a/src/dynamic_foraging_processing/qc/processed/plots.py b/src/dynamic_foraging_processing/qc/processed/plots.py
index d04c941..f655485 100644
--- a/src/dynamic_foraging_processing/qc/processed/plots.py
+++ b/src/dynamic_foraging_processing/qc/processed/plots.py
@@ -122,7 +122,7 @@ def _add_lickspout_position_plot(
         if position is None or len(position) == 0:
             continue
         values = np.asarray(position, dtype=float)
-        ax.plot(values - values[0], color, label=label)
+        ax.plot(values, color, label=label)
         plotted = True
     if plotted:
         ax.legend()
@@ -303,6 +303,14 @@ def plot_side_bias(
     )
     _add_reward_probabilities(ax[3], reward_probability_left, reward_probability_right)
 
+    # Align the x-axis across every panel so trials line up vertically. The
+    # panels are all indexed by trial, but some auto-scale (adding margins) while
+    # others set [0, N]; pin them all to a common [0, n_trials].
+    n_trials = max(len(np.asarray(side_bias)), len(np.asarray(animal_response)))
+    if n_trials:
+        for axis in ax:
+            axis.set_xlim([0, n_trials])
+
     fig.savefig(Path(results_folder) / SIDE_BIAS_PLOT, dpi=300, bbox_inches="tight")
     plt.close(fig)
     return SIDE_BIAS_PLOT
diff --git a/src/dynamic_foraging_processing/qc/processed/results.py b/src/dynamic_foraging_processing/qc/processed/results.py
index 762890f..a352d3d 100644
--- a/src/dynamic_foraging_processing/qc/processed/results.py
+++ b/src/dynamic_foraging_processing/qc/processed/results.py
@@ -22,15 +22,15 @@
 from dynamic_foraging_processing.qc.processed.plots import plot_lick_intervals, plot_side_bias
 
 # Logical input -> trials-table column name. Centralized so the mapping is easy
-# to correct against the trial-table builder; ``side_bias`` and the
-# ``lickspout_*`` arrays are not yet pinned down in trials_table_mapping.md.
+# to correct against the trial-table builder. The lickspout positions are
+# emitted by ``_TrialTableBuilder._lickspout_columns`` as ``lickspout_position_*``.
 _COLUMNS = {
     "animal_response": "animal_response",
     "side_bias": "side_bias",
-    "lickspout_x": "lickspout_x",
-    "lickspout_y1": "lickspout_y1",
-    "lickspout_y2": "lickspout_y2",
-    "lickspout_z": "lickspout_z",
+    "lickspout_x": "lickspout_position_x",
+    "lickspout_y1": "lickspout_position_y1",
+    "lickspout_y2": "lickspout_position_y2",
+    "lickspout_z": "lickspout_position_z",
     "rewarded_left": "rewarded_historyL",
     "rewarded_right": "rewarded_historyR",
     "reward_probability_left": "reward_probabilityL",
diff --git a/tests/test_qc/test_builder.py b/tests/test_qc/test_builder.py
index 69507e8..d560de8 100644
--- a/tests/test_qc/test_builder.py
+++ b/tests/test_qc/test_builder.py
@@ -48,6 +48,27 @@ def test_behavior_qc_results_writes_plots(tmp_path):
     assert os.path.exists(tmp_path / "lick_intervals.png")
 
 
+def test_column_resolves_lickspout_position_names():
+    """``lickspout_*`` inputs map to the trial table's ``lickspout_position_*``.
+
+    Regression guard: the trial-table builder emits ``lickspout_position_x`` etc.
+    (see ``_TrialTableBuilder._lickspout_columns``), so the mapping must resolve
+    those names or the lickspout-position plot panel silently comes up empty.
+    """
+    trials = pd.DataFrame(
+        {
+            "lickspout_position_x": [1.0, 1.1],
+            "lickspout_position_y1": [2.0, 2.0],
+            "lickspout_position_y2": [3.0, 3.1],
+            "lickspout_position_z": [4.0, 4.0],
+        }
+    )
+    for key in ("lickspout_x", "lickspout_y1", "lickspout_y2", "lickspout_z"):
+        column = _results._column(trials, key)
+        assert column is not None, key
+    np.testing.assert_array_equal(_results._column(trials, "lickspout_x"), [1.0, 1.1])
+
+
 def test_build_quality_control_defaults():
     """Defaults fill in the standard grouping and an empty failure allowlist."""
     metrics = to_metrics(