You go to Thamasa after the Veldt Cave because in the event you didn't wait for Shadow you'll find Relm there.
It's an interesting bit of scripting for the game, if I'm remembering it right. With Shadow dead, you have to find Relm in the Veldt Cave, which takes you to Thamasa, where she hikes off anyway and ends up doing the painting.
However, if Shadow lives, Relm goes right to the house to paint and Shadow gets his story started in the Veldt Cave instead.
... and for the dragons Storm Dragon makes the second - you found one at the Opera House, remember?
It's an interesting bit of scripting for the game, if I'm remembering it right. With Shadow dead, you have to find Relm in the Veldt Cave, which takes you to Thamasa, where she hikes off anyway and ends up doing the painting.
However, if Shadow lives, Relm goes right to the house to paint and Shadow gets his story started in the Veldt Cave instead.
... and for the dragons Storm Dragon makes the second - you found one at the Opera House, remember?