diff --git a/src/stamp/encoding/encoder/__init__.py b/src/stamp/encoding/encoder/__init__.py
index ca12421..9e76af5 100644
--- a/src/stamp/encoding/encoder/__init__.py
+++ b/src/stamp/encoding/encoder/__init__.py
@@ -219,30 +219,20 @@ def _save_features_(
 
 
 def _resolve_extractor_name(raw: str) -> ExtractorName:
-    """
-    Resolve an extractor string to a valid ExtractorName.
-
-    Handles:
-      - exact matches ('gigapath', 'virchow-full')
-      - versioned strings like 'gigapath-ae23d', 'virchow-full-2025abc'
-    Raises ValueError if the base name is not recognized.
-    """
     if not raw:
         raise ValueError("Empty extractor string")
 
     name = str(raw).strip().lower()
+    name = name.replace("_", "-")
 
-    # Exact match
     for e in ExtractorName:
         if name == e.value.lower():
             return e
 
-    # Versioned form: '<enum-value>-something'
     for e in ExtractorName:
         if name.startswith(e.value.lower() + "-"):
             return e
 
-    # Otherwise fail
     raise ValueError(
         f"Unknown extractor '{raw}'. "
         f"Expected one of {[e.value for e in ExtractorName]} "
diff --git a/src/stamp/encoding/encoder/eagle.py b/src/stamp/encoding/encoder/eagle.py
index b2fb293..d966c84 100644
--- a/src/stamp/encoding/encoder/eagle.py
+++ b/src/stamp/encoding/encoder/eagle.py
@@ -1,5 +1,6 @@
 import logging
 import os
+from collections import defaultdict, deque
 from pathlib import Path
 
 import numpy as np
@@ -59,11 +60,26 @@ def _validate_and_read_features_with_agg(
                 f"Features located in {h5_vir2} are extracted with {extractor}"
             )
 
-        if feats.shape[0] != agg_feats.shape[0]:
-            raise ValueError(
-                f"Number of ctranspath features and virchow2 features do not match:"
-                f" {feats.shape[0]} != {agg_feats.shape[0]}"
-            )
+        # if feats.shape[0] != agg_feats.shape[0]:
+        #     raise ValueError(
+        #         f"Number of ctranspath features and virchow2 features do not match:"
+        #         f" {feats.shape[0]} != {agg_feats.shape[0]}"
+        #     )
+        if not np.allclose(coords.coords_um, agg_coords.coords_um, atol=1e-5, rtol=0):
+            # Try to fix permutation by aligning virchow2 to ctp coords
+            try:
+                agg_feats, aligned_agg_coords = _align_vir2_to_ctp_by_coords(
+                    ref_coords_um=coords.coords_um,
+                    other_coords_um=agg_coords.coords_um,
+                    other_feats=agg_feats,
+                    decimals=5,
+                )
+                agg_coords.coords_um = aligned_agg_coords  # optional, for debugging
+            except ValueError as e:
+                raise ValueError(
+                    f"Coordinates mismatch between ctranspath and virchow2 features for slide "
+                    f"{slide_name}. Alignment attempt failed: {e}"
+                )
 
         if not np.allclose(coords.coords_um, agg_coords.coords_um, atol=1e-5, rtol=0):
             raise ValueError(
@@ -144,7 +160,7 @@ def encode_slides_(
         for tile_feats_filename in (progress := tqdm(os.listdir(feat_dir))):
             h5_ctp = os.path.join(feat_dir, tile_feats_filename)
             h5_vir2 = os.path.join(agg_feat_dir, tile_feats_filename)
-            slide_name: str = Path(tile_feats_filename).stem
+            slide_name: str = Path(tile_feats_filename).name
             progress.set_description(slide_name)
 
             # skip patient in case feature file already exists
@@ -238,3 +254,37 @@ def encode_patients_(
             self._save_features_(
                 output_path=output_path, feats=patient_embedding, feat_type="patient"
             )
+
+
+def _align_vir2_to_ctp_by_coords(
+    ref_coords_um: np.ndarray,
+    other_coords_um: np.ndarray,
+    other_feats: torch.Tensor,
+    decimals: int = 5,
+) -> tuple[torch.Tensor, np.ndarray]:
+    """Align vir2 features to ctp features based on coordinates."""
+    ref = np.round(np.asarray(ref_coords_um, dtype=np.float64), decimals)
+    oth = np.round(np.asarray(other_coords_um, dtype=np.float64), decimals)
+
+    # coord -> queue(indices)
+    buckets = defaultdict(deque)
+    for j, key in enumerate(map(tuple, oth)):
+        buckets[key].append(j)
+
+    perm = np.empty(ref.shape[0], dtype=np.int64)
+    for i, key in enumerate(map(tuple, ref)):
+        if not buckets[key]:
+            raise ValueError(f"Missing coord in other set: {key}")
+        perm[i] = buckets[key].popleft()
+
+    # optional: check if other has extras not used
+    unused = sum(len(q) for q in buckets.values())
+    if unused != 0:
+        raise ValueError(f"virchow2 features contain {unused} extra coords not in ref.")
+
+    perm_t = torch.as_tensor(perm, dtype=torch.long, device=other_feats.device)
+    # Align features according to the permutation as well !
+    aligned_feats = other_feats.index_select(0, perm_t)
+    aligned_coords = other_coords_um[perm]
+    print("")
+    return aligned_feats, aligned_coords