(1)W-2 Entered - Refund $2912 (2)W-2 Entered - New Refund $2916 Switched the Input order (2)W-2 Entered - Refund $1476 (1)W-2 Entered - Refund $2916 Why?

Wondering why both W-2's separately can give me a combined total of 4392 dollars, but when added together they only add up to a refund of 2916. Its as if the (2)W-2 one only gave me 4 dollars when entered second, but gave me 1476 when entered first.