I'm not sure what exactly your problem is, but the change of behavior you see here is a reaction to one of the most irritating bugs in the original firmware:

In the original implementation, tapping on the entry in the call log showed the contact. There was no way to tell if the call was from the contact's mobile phone number, home or office.

No, as far as I can tell from my call log, you see the exact number and can either call or send an SMS. That's what members of this community asked of Nokia.

You can still go to the full contact details and choose to call via, say, SIP or GTalk, by pressing on the entry longer than a second. You'll see a context menu and can either delete the entry or open the details.