diff --git a/kadi/commands/commands_v2.py b/kadi/commands/commands_v2.py
index 2a2a4780..b97255a4 100644
--- a/kadi/commands/commands_v2.py
+++ b/kadi/commands/commands_v2.py
@@ -1315,26 +1315,12 @@ def get_matching_block_idx(cmds_arch, cmds_recent):
     idx_arch_recent = cmds_arch.find_date(cmds_recent["date"][0])
     logger.info("Selecting commands from cmds_arch[{}:]".format(idx_arch_recent))
     cmds_arch_recent = cmds_arch[idx_arch_recent:]
+    cmds_arch_recent.rev_pars_dict = weakref.ref(REV_PARS_DICT)
 
-    # Define the column names that specify a complete and unique row
-    key_names = ("date", "type", "tlmsid", "scs", "step", "source", "vcdu")
+    arch_vals = get_list_for_matching(cmds_arch_recent)
+    recent_vals = get_list_for_matching(cmds_recent)
 
-    recent_vals = [
-        tuple(
-            row[x].decode("ascii") if isinstance(row[x], bytes) else str(row[x])
-            for x in key_names
-        )
-        for row in cmds_arch_recent
-    ]
-    arch_vals = [
-        tuple(
-            row[x].decode("ascii") if isinstance(row[x], bytes) else str(row[x])
-            for x in key_names
-        )
-        for row in cmds_recent
-    ]
-
-    diff = difflib.SequenceMatcher(a=recent_vals, b=arch_vals, autojunk=False)
+    diff = difflib.SequenceMatcher(a=arch_vals, b=recent_vals, autojunk=False)
 
     matching_blocks = diff.get_matching_blocks()
     logger.info("Matching blocks for (a) recent commands and (b) existing HDF5")
@@ -1362,6 +1348,32 @@ def get_matching_block_idx(cmds_arch, cmds_recent):
     return idx0_arch, idx0_recent
 
 
+def get_list_for_matching(cmds: CommandTable) -> list[tuple]:
+    # Define the column names that specify a complete and unique row
+    keys = ("date", "type", "tlmsid", "scs", "step", "source", "vcdu")
+    rows = []
+    for cmd in cmds:
+        row = tuple(
+            cmd[key].decode("ascii") if isinstance(cmd[key], bytes) else str(cmd[key])
+            for key in keys
+        )
+        # Special case for OBS command. The obs_stop param can change during anomaly
+        # recovery when there is a CMD_EVT maneuver but no subsequent maneuver to define
+        # obs_stop. In theory we could include these params in the match tuple for every
+        # command in the matching, but it turns out that (for reasons I don't fully
+        # understand) the AOSTRCAT yang and zang params are very slightly different at
+        # floating point precision level, so the matches fail. Since all the other
+        # commands are not mutable in this way we just apply this for OBS commands.
+        if cmd["tlmsid"] == "OBS":
+            row_params = tuple(
+                (key, cmd["params"][key]) for key in sorted(cmd["params"])
+            )
+            row += row_params
+        rows.append(row)
+
+    return rows
+
+
 TYPE_MAP = ["ACQ", "GUI", "BOT", "FID", "MON"]
 IMGSZ_MAP = ["4x4", "6x6", "8x8"]
 PAR_MAPS = [