Should bar tape have sporadic or constant adhesive?

I ordered bar tape from Nashbar, and peeling away the protective tape
seems to peel away most of the adhesive, leaving only sporadic strips.
Is this supposed to happen, or should I ask for a replacement? It
looks something like:

==============================================================
-- - --- -- -
==============================================================

Also, the guides I find on the Web say to wrap from the bottom of the
bar, and end by securing the loose end with electric tape. My parents
think I should wrap from the top, and end by securing the loose end
under the cap. This seems more reasonable, but then why do the guides
say to wrap the tape in what seems to me to be the wrong direction?

.

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