I have seen people do this before: "I have HOT Venom and WOS bullseye. I add t-bolts. I only have enough points left for one t-bolt, so I just add it to bullseye and everything's ok"

Is this ok?

by the wording of ATAs I wouldn't think so

Or did it used to be this way and it has since changed?

It wouldn't work, nor has it ever worked.