[Genome] the kgAlias table

[Yuval Nevo]

hi,
I have a list of genes taken from the GenBank files (last version, 29 Aug.
2006) that I am trying to match with the unique UCSC gene names (e.g.
uc001aaa.1), using the kgAlias table.
I have encountered numerous gene names with no match. 1960 names start with
'LOC', another 408 do not. below are several examples:
LOC642622
LOC728065
LOC728152
(when searched for in the genome browser they can't be found)
and
FAM21B
TMEM23
LIPL2
(are found in the browser but have a different name in the kgAlias table).
Why can't I find these aliases in the kgAlias table? Should the table be
updated?
note: I can send the full list of these names if you like.
Thanks, Yuval (a PhD student).