What do A pos and C pos mean?
The # column is the rank of each listed entry for Scott Diddams — rank 1 means this entry is where Scott Diddams has the most articles or citations. A pos and C pos show the reciprocal: the position of Scott Diddams within that entry's own ranked list, by articles and citations respectively. A low value means Scott Diddams is among the most prominent contributors for that entry.