So that means all the voting is ignored? No EC votes are used and the POTUS and VP are chosen by the senate and house?
Yes
Yes.
Voting for President is, in an of itself, only one means by which the state legislatures have decided electors may be appointed.
As a practical matter it couldn't happen, but as a legal matter, if a state legislature passes a law that says "the electors from the Kangaroo State shall be chosen by a vote of the legislature on December 10th," then that is the way they will be selected, and The People would not get a direct vote at all.