diff --git a/libraries/liblmdb/CHANGES b/libraries/liblmdb/CHANGES
index 07b087aad9..fb4b482385 100644
--- a/libraries/liblmdb/CHANGES
+++ b/libraries/liblmdb/CHANGES
@@ -9,6 +9,7 @@ LMDB 0.9.17 Release Engineering
 	Fix ITS#8263 cursor_put cursor tracking
 	Fix ITS#8264 cursor_del cursor tracking
 	Fix ITS#8299 mdb_del cursor tracking
+	Fix ITS#8300 mdb_del cursor tracking
 	Fix ITS#7771 fakepage cursor tracking
 	Fix ITS#7789 ensure mapsize >= pages in use
 	Fix ITS#7971 mdb_txn_renew0() new reader slots
diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 0bff10e759..56b731de56 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -7598,16 +7598,19 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst)
 		MDB_dbi dbi = csrc->mc_dbi;
 		MDB_page *mp;
 
-		mp = cdst->mc_pg[csrc->mc_top];
-		for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-			if (csrc->mc_flags & C_SUB)
-				m3 = &m2->mc_xcursor->mx_cursor;
-			else
-				m3 = m2;
-			if (m3 == cdst) continue;
-			if (m3->mc_pg[csrc->mc_top] == mp && m3->mc_ki[csrc->mc_top] >=
-				cdst->mc_ki[csrc->mc_top]) {
-				m3->mc_ki[csrc->mc_top]++;
+		/* If we're adding on the left, bump others up */
+		if (!cdst->mc_ki[csrc->mc_top]) {
+			mp = cdst->mc_pg[csrc->mc_top];
+			for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
+				if (csrc->mc_flags & C_SUB)
+					m3 = &m2->mc_xcursor->mx_cursor;
+				else
+					m3 = m2;
+				if (m3 == cdst) continue;
+				if (m3->mc_pg[csrc->mc_top] == mp && m3->mc_ki[csrc->mc_top] >=
+					cdst->mc_ki[csrc->mc_top]) {
+					m3->mc_ki[csrc->mc_top]++;
+				}
 			}
 		}
 
@@ -8009,7 +8012,8 @@ mdb_rebalance(MDB_cursor *mc)
 	 */
 	if (PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) >= thresh && NUMKEYS(mn.mc_pg[mn.mc_top]) > minkeys) {
 		rc = mdb_node_move(&mn, mc);
-		if (mc->mc_ki[mc->mc_top-1]) {
+		if (!mc->mc_ki[mc->mc_top]) {
+			/* if we inserted on left, bump position up */
 			oldki++;
 		}
 	} else {