Actually you pass it through the loop before you do the wraps.
Pass through loops, pull tight, give two wraps, there goes your primary tie-off.
The direction of the wrap is important.
The woody loop is just a simple overhand knot.
Here goes a few pictures showing how a primary tie off is done.
Notice in the first picture that the line (spool/reel) has been run through the loop at the end of the line (the large loop, not the woody).
Notice in the second picture how the line is pulled back against the loop locking it.
Notice the two added wraps on the last pic.
EDIT - Just realized that this is the DIR forum. They may teach the primary tie off as wraps first then through the loop.