diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 4a251f2e1c..fcfdd05275 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -7643,9 +7643,9 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst)
 		uint16_t depth = cdst->mc_db->md_depth;
 		mdb_cursor_pop(cdst);
 		rc = mdb_rebalance(cdst);
-		/* Did the tree shrink? */
-		if (depth > cdst->mc_db->md_depth)
-			snum--;
+		/* Did the tree height change? */
+		if (depth != cdst->mc_db->md_depth)
+			snum += cdst->mc_db->md_depth - depth;
 		cdst->mc_snum = snum;
 		cdst->mc_top = snum-1;
 	}
@@ -7837,7 +7837,7 @@ 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[ptop]) {
+		if (mc->mc_ki[mc->mc_top-1]) {
 			oldki++;
 		}
 	} else {
@@ -8050,8 +8050,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
 		mc->mc_ki[0] = 0;
 		mc->mc_db->md_root = pp->mp_pgno;
 		DPRINTF(("root split! new root = %"Z"u", pp->mp_pgno));
-		mc->mc_db->md_depth++;
-		new_root = 1;
+		new_root = mc->mc_db->md_depth++;
 
 		/* Add left (implicit) pointer. */
 		if ((rc = mdb_node_add(mc, 0, NULL, NULL, mp->mp_pgno, 0)) != MDB_SUCCESS) {
@@ -8364,7 +8363,7 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
 			if (new_root) {
 				int k;
 				/* root split */
-				for (k=m3->mc_top; k>=0; k--) {
+				for (k=new_root; k>=0; k--) {
 					m3->mc_ki[k+1] = m3->mc_ki[k];
 					m3->mc_pg[k+1] = m3->mc_pg[k];
 				}
diff --git a/libraries/liblmdb/mdb_dump.1 b/libraries/liblmdb/mdb_dump.1
index dd545049b2..5a647ba2ec 100644
--- a/libraries/liblmdb/mdb_dump.1
+++ b/libraries/liblmdb/mdb_dump.1
@@ -5,7 +5,6 @@
 mdb_dump \- LMDB environment export tool
 .SH SYNOPSIS
 .B mdb_dump
-.BR \ envpath
 [\c
 .BR \-V ]
 [\c
@@ -19,6 +18,7 @@ mdb_dump \- LMDB environment export tool
 [\c
 .BR \-a \ |
 .BI \-s \ subdb\fR]
+.BR \ envpath
 .SH DESCRIPTION
 The
 .B mdb_dump
diff --git a/libraries/liblmdb/mdb_dump.c b/libraries/liblmdb/mdb_dump.c
index 7202d865bc..16c0aae1b7 100644
--- a/libraries/liblmdb/mdb_dump.c
+++ b/libraries/liblmdb/mdb_dump.c
@@ -155,7 +155,7 @@ static int dumpit(MDB_txn *txn, MDB_dbi dbi, char *name)
 
 static void usage(char *prog)
 {
-	fprintf(stderr, "usage: %s dbpath [-V] [-f output] [-l] [-n] [-p] [-a|-s subdb]\n", prog);
+	fprintf(stderr, "usage: %s [-V] [-f output] [-l] [-n] [-p] [-a|-s subdb] dbpath\n", prog);
 	exit(EXIT_FAILURE);
 }
 
diff --git a/libraries/liblmdb/mdb_load.1 b/libraries/liblmdb/mdb_load.1
index 511ec552b4..712ed0540d 100644
--- a/libraries/liblmdb/mdb_load.1
+++ b/libraries/liblmdb/mdb_load.1
@@ -5,7 +5,6 @@
 mdb_load \- LMDB environment import tool
 .SH SYNOPSIS
 .B mdb_load
-.BR \ envpath
 [\c
 .BR \-V ]
 [\c
@@ -18,6 +17,7 @@ mdb_load \- LMDB environment import tool
 .BR \-N ]
 [\c
 .BR \-T ]
+.BR \ envpath
 .SH DESCRIPTION
 The
 .B mdb_load
diff --git a/libraries/liblmdb/mdb_load.c b/libraries/liblmdb/mdb_load.c
index 1f6ce0b7ec..160bc1b885 100644
--- a/libraries/liblmdb/mdb_load.c
+++ b/libraries/liblmdb/mdb_load.c
@@ -276,7 +276,7 @@ badend:
 
 static void usage(void)
 {
-	fprintf(stderr, "usage: %s dbpath [-V] [-f input] [-n] [-s name] [-N] [-T]\n", prog);
+	fprintf(stderr, "usage: %s [-V] [-f input] [-n] [-s name] [-N] [-T] dbpath\n", prog);
 	exit(EXIT_FAILURE);
 }
 
diff --git a/libraries/liblmdb/mdb_stat.1 b/libraries/liblmdb/mdb_stat.1
index e6ee5ad585..351c017578 100644
--- a/libraries/liblmdb/mdb_stat.1
+++ b/libraries/liblmdb/mdb_stat.1
@@ -5,7 +5,6 @@
 mdb_stat \- LMDB environment status tool
 .SH SYNOPSIS
 .B mdb_stat
-.BR \ envpath
 [\c
 .BR \-V ]
 [\c
@@ -19,6 +18,7 @@ mdb_stat \- LMDB environment status tool
 [\c
 .BR \-a \ |
 .BI \-s \ subdb\fR]
+.BR \ envpath
 .SH DESCRIPTION
 The
 .B mdb_stat
diff --git a/libraries/liblmdb/mdb_stat.c b/libraries/liblmdb/mdb_stat.c
index 210609b324..6f4b3ee4f3 100644
--- a/libraries/liblmdb/mdb_stat.c
+++ b/libraries/liblmdb/mdb_stat.c
@@ -37,7 +37,7 @@ static void prstat(MDB_stat *ms)
 
 static void usage(char *prog)
 {
-	fprintf(stderr, "usage: %s dbpath [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb]\n", prog);
+	fprintf(stderr, "usage: %s [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb] dbpath\n", prog);
 	exit(EXIT_FAILURE);
 }