Luckily for me I only had the last quest state/status missing in my journal "HaveBothParts".
But it may be possible that the game only checks for "HaveBothParts" when turning in the quest. So if you're up to it, I suggest you should only try to focus on this part in your journals:
<node id="ActivatedState">
<attribute id="Status" value="HaveBothParts" type="22" />
<attribute id="TimeStamp" value="194390" type="5" />
</node>
And add the appropriate identifier ID to it.
Also about the TimeStamp. I didn't see it mentioned anywhere else, so it might be purely cosmetic for the in game GUI. I would try to use a value that is higher than your other statuses in RC_GY_Godslayer quest.
