How to set Presence location to specific hard key on Polycom Phones

Hello,

Using Polycom VVX 450 phones with 12 buttons. On the admin website you can program presence buttons for users but even though it gives the option to choose which specific button to choose on the end users phone it always adds them to the next available empty button. Doesn't matter if you choose leave empty space or collapse list. On the web portal is shows the correct layout but on the actual phone it doesn't match. Am I missing something on how to get it to save to the button you choose on the web portal?

Thanks

Joe