Just starting to learn pick appraisal, and this keeps happening. Is my appraisal off because I am just starting to learn this? I'm down to 4 picks on the table. None of them appear to be much better than the others! Two damaged and two neglected. Clearly my appraisal is off, but why?

>>lmaster appraise my lock
You examine the plain lockpick very closely. It appears to be noticeably damaged.
Roundtime: 3 sec.
R>put lock on table
You place your plain lockpick on the wooden table.
>get other lock
You remove a plain lockpick from on a small wooden table.
>lmaster appraise my lock
You examine the plain lockpick very closely. It appears to be in a neglected state.
Roundtime: 3 sec.
R>put lock on table
You place your plain lockpick on the wooden table.
>get third lock
You remove a plain lockpick from on a small wooden table.
>lmaster appraise my lock
You examine the plain lockpick very closely. It appears to be noticeably damaged.
Roundtime: 2 sec.
R>put lock on table
You place your plain lockpick on the wooden table.
>get fourth lock
You remove a plain lockpick from on a small wooden table.
>lmaster appraise my lock
You examine the plain lockpick very closely. It appears to be in a neglected state.
Roundtime: 2 sec.
R>give lock to bean
Master Footpad Bean accepts the plain lockpick with a nod before looking over your handiwork.

Bean says, "Nawp, sorry. Lemme rearrange these."<<

"So, what does that green line on the graph represent?"
"Oh, that's the projection of a hypothetical offspring from a union between Sauron and Cruella de Ville; we use that as a baseline for determining character alignment."