Sorry for the confusion, I am not good at explaining at all.
First you send the first patch to your P's and then patch it, since it is patched, delete it if you want. What your deleting is just the installation file (the patch file)
Second you send the second patch to your P's and then patch it, since this is also patched, delete it if you want. What your deleting is just the installation file (the patch file)
Third you send the third patch to your P's and then patch it. This time, you will get an error, because you can only have 2 patch stored in the tamagotchi at a time, the patch acts like a destination, the max amount of downloadable destinations you can have is 2. Delete 1 of the previous patch and send this 3rd patch to your tamagotchi, patch it and your done. Delete the patches if you want