Minor rewording/grammar

supporting-docs/howtos/client-server-migrating-from-v1.rst

@@ -51,11 +51,11 @@ following summary may be useful to compare with ``v1``:
 
  * In ``/events`` if more events occurred since the ``since`` token than the
    ``limit`` parameter allowed, then events from the start of this range were
-   returned and the client must perform another fetch to incrementally obtain
-   more of them. In the ``/sync`` API the result always contains up to the most
-   recent event; creating a gap if this would be more events than the requested
-   limit. If this occurs then the client can use the ``prev_batch`` token as a
-   reference to obtaining more.
+   returned and the client had to perform another fetch to incrementally obtain
+   more of them. In the ``/sync`` API the result always contains the most
+   recent events, creating a gap if this would be more events than the
+   requested limit. If this occurs then the client can use the ``prev_batch``
+   token as a reference to obtaining more.
 
 There is no direct replacement for the per-room ``/rooms/:roomId/initialSync``
 endpoint, but the behaviour can be recreated by applying an ad-hoc filter using