[WriteLog] Missing Points for ARRL DX Contest

[Dave Smith - W6TE]

Friends,

I am going over my log for the ARRK DX contest last weekend and find
that several contacts were not given points credit. Namely, S. Korea,
New Zeland, St Kitts, Turks & Caicos, Mexico, Italy, Norway, Hawaii,
Japan..... what's weird is that others worked from those same countries
were scored.... what am I doing wrong, what should I be looking for, and
how can I fix these errors?

Thank you, 

Dave Smith / W6TE