Board Game Arena

Hi. I was just in a game where in the final round one player played 3 different action cards in one turn and I don't understand how that is possible. I tried the replay function but that just keeps crashing my browser. So I am hoping someone here can provide some answers hopefully. I posted the transcript of that move below. I'de love to understand what just happend here. feeling really dumb right now

End of game triggered
Move 583 :02:37:21
Solari chooses action card AssociationII with strength 5
Move 584 :02:37:59
Solari supports a conservation project on the second slot : Low Mountain Range
Solari releases Northern Cassowary into the wild and loses 6 appeal and frees a size-3 enclosure
Solari gains 4 conservation (Low Mountain Range)
Move 585 :02:38:07
Solari donates to an association
Solari donates 12 money to get 1 conservation
Solari places action card Association at position 1 (finishing action)
Move 592 :02:38:46
Solari pays 1 xtoken for increasing card strength
Solari chooses action card AnimalsII with strength 5
Solari gains 1 reputation (max strength Animals)
Solari gains 1 xtoken (reputation track bonus)
Move 593 :02:39:00
Solari plays Australian Pelican for 10 and places it in a size-4 enclosure
Solari gains 3 money (Ornithologist)
Solari gains 5 appeal (Australian Pelican)
Move 594 :02:39:14
Solari buys Reindeer from display for 12 and places it in a size-3 enclosure
Solari gains 5 appeal (Reindeer)
Solari places action card Animals at position 1 (finishing action)
Move 598 :02:39:30
Solari pays 1 xtoken for increasing card strength
Solari chooses action card BuildII with strength 4
Move 599 :02:39:38
Solari pays 8 for building a size-4 enclosure
Solari gains 2 money (placement bonus)
Solari gains 7 appeal (filling the map)
Solari places action card Build at position 1 (finishing action)

Initial move was supporting a conversation project, and their map had "determination" as a conservation bonus, so that got then ah actually l extra action.

They chose animal with the extra action, and one of the animals they played was the pelican, which let's you take the build action.

They then used the build action from pelican as their 3rd action.

All legal.