Can't create a second custom preset without it affecting the first custom preset

[FLAPAMac]

Tried something that I thought was very simple.

1. Create an 8 in x 10 in x 300 dpi preset. That worked!

2. Create a second preset. This one is 10 in x 8 in x 300 dpi. 

3. Adding the second preset changed the first preset so now I have two presets that are identical.

Am I doing something wrong?

[Komatös]

Hi @FLAPAMac

Why two, in principle, the same presets? To determine the alignment, there are the selection icons!