The REST API that export Execution Results (TestRuns) is not limiting the result correctly

The REST API that export Execution Results (TestRuns) is not limiting the result correctly.

How to reproduce:

1. Create a few Tests
2. Execute each Test in several Test Executions, so each Test has more then one Test Run
3. Add all of them to a Test Plan
4. Run the REST API using page and limit: /rest/raven/1.0/testruns?testPlanKey=TESTPLAN-87&page=1&limit=50
5. More then 50 entries are returned