Other mistake: In the CIC, Tigh challenges Apollo and asks why he isn't in the brig. Shortly after Apollo begins to explain the plan for the search and rescue of the Raptor downed on Kobol. He refers to it as "Raptor 3" when it is Raptor 1 they are looking for. Raptor 3 was destroyed when they first jumped to Kobol, Raptor 2 escaped back to Galactica, and 1 fell to Kobol. The Raptor on Kobol is referred to as Raptor 1 throughout the rest of the episode and on preceding episodes.
Other mistake: After she is sprung from prison and sneaks off the Galactica, President Roslin makes an appeal to the fleet to follow her ship to find the servant of the gods with the arrow of Apollo on Kobol. She is presumably speaking about Starbuck. But Starbuck was sent to and retrieved the arrow of Apollo from a museum on Caprica.
Chosen answer: Her motives are never explained. One possibility would be curiosity, a simple experiment in human infant physiology. Another, perhaps more likely one from her subsequent look of apparent distress is that it was, in an odd way, an act of mercy, giving an innocent baby a swift death, rather than leaving it to die in the nuclear fire or of radiation poisoning afterwards.
Tailkinker ★