Why do my 21-40 ranges appear to be the same as 1-20?

After I programmed masters 1-20 I switched over to 21-41 and they were already programmed with the content from the first range. I deleted one and went back to the first range and it was deleted there as well. This is the same for all of the ranges except the last one. I'm using a Cobalt 10. I can't find the answer in the manual. Anyone else have this problem?

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