Hi Keith,
I just checked my Chart of Accounts and I saw negative balance with a minus sign infront of the amount. Have you checked QuickBooks to see how it shows up there? Just to confirm we are looking at the same screen, I went Home > Chart of Accounts in Method and compared it to what I have in QuickBooks. You can also confirm an account with a negative balance in QB and then go over to Method and see how it shows up. Keep me posted.