Please note, that updated libraries are not automatically updated in the services. If you update the version of a library in the Designer administration, you need to save the library in the service again.
Use the icon on the Libraries folder in the service panel to open the Manage Libraries dialog. Since you used this library in your service already, it is displayed in section Used Libraries.
To ensure that the updated version is loaded into the service, just click the Save button.
Switching Between Library Versions
The Designer allows you to upload several versions of a library. The developer can switch between versions which allows him to decide with which library version he wants to work.