Update CLUSTER_MGMT.md

doc/CLUSTER_MGMT.md

@@ -2,10 +2,10 @@
 This document describes, in detail, how to create and manage a rqlite cluster.
 
 ## Practical cluster size
-Clusters of 3, 5, 7, or 9, nodes are most practical. Clusters with a greater number become unweildy.
+Clusters of 3, 5, 7, or 9, nodes are most practical. Clusters with a greater number start to become unweildy.
 
 ## Clusters with an even-number of nodes
-There is no point running clusters with even numbers of nodes. To see why this is imagine you have one cluster of 3 nodes, and a second cluter of 4 nodes. As usual a majority of nodes are required for each cluster to reach consensus on any change.
+There is little point running clusters with even numbers of nodes. To see why this is imagine you have one cluster of 3 nodes, and a second cluter of 4 nodes. As usual a majority of nodes are required for each cluster to reach consensus on any change.
 
 A majority is defined as `N/2 + 1` where `N` is the number of nodes in the cluster. For a 3-node a majority is 2; for a 4-node cluster a majority is 3. Therefore a 3-node cluster can tolerate the failure of a single node, and 4-node cluster can also only tolerate a failure of a single node.