Well you only get 1 refund on your tax return for all your income. What do you mean you completed one W2? Did you file and submit your return after the first one? Did you go all the way to the end though the 3 steps and hit the big orange Transmit Returns Now button after the first one? You have to file all your income on the same tax return.
Usually entering more than 1 W2 will reduce your refund. You entered more income but each job only took out withholding for that 1 job. But you are taxed on the total income for the year. So you may not have enough withholding taken out to cover the combined income.
