excel 2007:
I have a workbook that has one sheet in it. It was started from using the
personal monthly budget template provided with excel. I inserted this
template and then edited it to my liking. It works great. No macros or vb
script, simply uses tables, formulas, and conditional formatting.
The problem is when I try to copy this sheet into the same workbook the
first copy works fine, then I try to make another copy and I get a warning
dialog box that says: the sheet you want to copy contains the name 'payment
date', which already exists on the destination worksheet. Do you want to use
this version of the name?

I dont understand what it's asking here....
1) I do not have the name payment_date anywhere in the sheet or in any
formula on the sheet.
2) even if I did the message makes no sense as of course the destination
sheet is going to have that name because its a copy of another sheet, it
should be the same with all the same names, so of course the destination
would have the same name.
3) why does the first copy of the sheet give no warning message at all, but
subsequent copies does gives the warning message.

Can someone explain this message, tell me why I'm getting it, and how to get
excel to stop warning me.
Thanks.