Media Center (Adding Channels Manually?)

Is it possible to add channels manually to Media Center when viewing
Live TV? For some reason the automatic channel setup can access all
the channels but will not list them all. So, for instance, when I
get to channel 62 a channel up button will get me to channel 98. I
can type in the live channels in between and access them that way, but
I am puzzled by the failure of the automatic process to list all the
channels. This also affects the Guide which also skips the channels
between 62 and 98.

I am running XP SP2 and Media Center is 2005 with Roll Up 2.

TIA

Tom
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In every assembly, of whatever size, passion will
always steal the crown from reason. John Adams
.