diff --git a/crates/loro-core/src/fuzz.rs b/crates/loro-core/src/fuzz.rs
index 89d8c6ed..29c3a290 100644
--- a/crates/loro-core/src/fuzz.rs
+++ b/crates/loro-core/src/fuzz.rs
@@ -649,12 +649,25 @@ mod test {
     #[test]
     fn case_two() {
         test_multi_sites(
-            2,
-            &mut [Ins {
-                content: 123,
-                pos: 0,
-                site: 1,
-            }],
+            3,
+            &mut [
+                Ins {
+                    content: 35108,
+                    pos: 0,
+                    site: 2,
+                },
+                Ins {
+                    content: 4626,
+                    pos: 0,
+                    site: 4,
+                },
+                SyncAll,
+                Ins {
+                    content: 65462,
+                    pos: 7,
+                    site: 4,
+                },
+            ],
         )
     }
 
diff --git a/crates/loro-core/src/log_store/iter.rs b/crates/loro-core/src/log_store/iter.rs
index ce94c7f3..d23910f9 100644
--- a/crates/loro-core/src/log_store/iter.rs
+++ b/crates/loro-core/src/log_store/iter.rs
@@ -94,8 +94,8 @@ impl<'a> Iterator for OpSpanIter<'a> {
                 let op = RichOp::new_by_slice_on_change(
                     change,
                     op,
-                    self.span.counter.min(),
-                    self.span.counter.end(),
+                    self.span.counter.min() - change.id.counter,
+                    self.span.counter.end() - change.id.counter,
                 );
                 if op.atom_len() == 0 {
                     return None;
diff --git a/crates/loro-core/tests/test.rs b/crates/loro-core/tests/test.rs
index 62796608..7233c527 100644
--- a/crates/loro-core/tests/test.rs
+++ b/crates/loro-core/tests/test.rs
@@ -1,6 +1,5 @@
 use ctor::ctor;
 
-pub mod tests;
 use loro_core::container::registry::ContainerWrapper;
 use loro_core::{LoroCore, LoroValue};
 
diff --git a/crates/loro-core/tests/tests/mod.rs b/crates/loro-core/tests/tests/mod.rs
deleted file mode 100644
index cdafe4ad..00000000
--- a/crates/loro-core/tests/tests/mod.rs
+++ /dev/null
@@ -1 +0,0 @@
-pub mod task;
diff --git a/crates/loro-core/tests/tests/task.rs b/crates/loro-core/tests/tests/task.rs
deleted file mode 100644
index 04ee3dd0..00000000
--- a/crates/loro-core/tests/tests/task.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-use std::io::Read;
-
-use flate2::read::GzDecoder;
-use loro_core::container::registry::ContainerWrapper;
-use loro_core::LoroCore;
-use serde_json::Value;
-
-const RAW_DATA: &[u8; 901823] = include_bytes!("../../benches/automerge-paper.json.gz");
-
-#[test]
-pub fn automerge_direct_sync() {
-    let mut d = GzDecoder::new(&RAW_DATA[..]);
-    let mut s = String::new();
-    d.read_to_string(&mut s).unwrap();
-    let json: Value = serde_json::from_str(&s).unwrap();
-    let txns = json.as_object().unwrap().get("txns");
-    let mut loro = LoroCore::default();
-    let mut loro_b = LoroCore::default();
-    for txn in txns.unwrap().as_array().unwrap() {
-        let text = loro.get_text("text");
-        text.with_container(|text| {
-            let patches = txn
-                .as_object()
-                .unwrap()
-                .get("patches")
-                .unwrap()
-                .as_array()
-                .unwrap();
-            for patch in patches {
-                let pos = patch[0].as_u64().unwrap() as usize;
-                let del_here = patch[1].as_u64().unwrap() as usize;
-                let ins_content = patch[2].as_str().unwrap();
-                text.delete(&loro, pos, del_here);
-                text.insert(&loro, pos, ins_content);
-            }
-        });
-
-        loro_b.import(loro.export(loro_b.vv()));
-    }
-}