There are 663 entries listed when searching for John Lawson. One of them is in my watchlist but does not appear in the first 100 displayed. When I click the radio button for "only my Watchlist" in the search options, I get "Sorry, no matches were found". The same problem occurs with other names.
Now that I look at it, an even worse problem is that only one John Lawson appears at the top of the search list, the others being name variants, when there are obviously many more.