in two weeks ITS my moms birthday & my family is throwing a party ON THE SWAP SHIFT board I put two days one was for 4hour shift the other was two hour since I could work the other 6 hours. Two people said they could take it & signed their name but SOMEONE whited out the 2 hours I can't work. And that's my moms birthday should I just tell them I have to leave early. Why didn't they let the person take my two hour shift