No, it isn't. What is stated is stated plainly and clearly. Of course, I didn't post anything about most of verse 8 and all of verse 9. My point was clearly the beginning of verse 8--"But of the Son he says." That leads to verses 10-12, so that we know the Father is speaking when verse 10 begins with "And."
It strongly implies it, from the Father's own words no less.
Except that it doesn't. What you don't seem to realize, or believe, is that the Bible uses progressive revelation. That is, what we read in the NT provides additional information for clarification on much of the OT. That is why the writers of the NT so often apply OT passages to Jesus, that no one would connect if they hadn't said so. This is a plain and obvious fact.
So, in the Father saying that the Son is the creator and Yahweh, as mentioned in Ps. 102, the writer of Hebrews is bringing additional information that brings more clarification to just who Yahweh truly is. In this case, Yahweh is at least both Father and Son.
In the current OT it says the same. Yet, in the NT, we have the Son also involved in the creation of everything. Of course, the Holy Spirit seemed to have been involved in creation according to Gen. 1:2.
Exactly. And that never changes in the NT.
Except that you don't. You contradict him, essentially calling him a liar.