Hi Sweet Cookie,
It might be better to get a new BC with the correct/consistent dates printed and if possible omit it.
My wife had her Date of Birth (DoB) printed differently on her BC and Baptism certificate. Eventually, she got a new BC to make the printed DoB consistent among all her documents.
If you don't wish to do that, then I agree with Iain and would also suggest to declare all discrepancies upfront. If its an issue with the ECO, they would *probably* ask you to explain the dates on the document.
Cheers,
Ben B
