[dogruck]

They should reindex their archive of tips. I was baffled by the jump from tip 1 to 55 to 77.

Edit: the indexing is explained in a note on the site.

[cbcoutinho]

The index is related to when the tips were published internally at Google, and are not re-indexed for the sake of those who have already seen them

[wingerlang]

If you look at the paragraph above them, last in the article they explain why it is.

[steev]

This is specifically addressed in the article at the bottom as a note.