How to keep own grouped and sorted channel lists?

#1
Channel list editing is a nice thing: just create a new one - unsorted and ungrouped, create your own folders an put the channels into the folders of your preference and sort them in your own way.

So far so good.

But I now spent about two hours to create one - it was hadly finished - and with one wrong click, all was gone; the folders are no longer there, and sorting is totally chaotic so that I have to start again spending another two hours for sorting and grouping again.

Question: how to avoid that? How to create and fix a custom list that cannot be killed so easily? And what's the behaviour when new channels come along or channels change frequency? How to recreate those lists (in a once created order) when lots of channels get lost and later on come again? The list should have a blocking of any new grouping or sorting without confirmation!