This usually happens when an amount field is left blank. Try entering 0 for each split amount first. You should then be able to change any amount without it being pre-filled.
02/27/2007 09:55:48
Eleanor
User
split transaction
On the split page after I enter the full amount at the top and then go down to choose the categories for each part the amount gets filled in automatically and won't let me divide the amt the way I want.