Number of Executors: 2

If two jobs are configured as shown below, both jobs are started and executed at the same time. What i expected is that one of them starts and the second one is in the build queue.
The same behavior occurs, if they are triggered by a post-commit hook.
The real use case is triggered by a post-commit hook, the example depicted below is only to reproduce this behavior.

Cofiguration of job A:
Throttle Concurrent Builds

• Throttle this project as part of one or more categories
• Maximum Total Concurrent Builds: 1
• Maximum Concurrent Builds Per Node: 1
• Multi-Project Throttle Category: Catergory_1

Build periodically
Schedule 30 11 * * *

Configuration of job B:
Throttle Concurrent Builds

• Throttle this project as part of one or more categories
• Maximum Total Concurrent Builds: 1
• Maximum Concurrent Builds Per Node: 1
• Multi-Project Throttle Category: Catergory_1

Build periodically
Schedule 30 11 * * *