I hate relying on deletion for organization, so that was kind of my thinking behind the "Manual" sort order, so you could organize more often-used probes first.
But, I admit, it's not a perfect solution. I've already got the code completed for a filter, similar to sort, that lets you view by a time frame. I do plan on enabling that in Beans, Roasts, Blends, Cuppings, and Profiles when I get some time to do the testing. This will let you "hide" older stuff, yet still allow you keep it in the database for future use.