Because of these lines (around line 298) in rc.sysinit.
# Set the TIVO_SVR_ADDR up.
if [ ! "$xTIVO_SVR_ADDR" = "" ]; then
echo "Changing SVR ADDR to $xTIVO_SVR_ADDR"
echo "Using default TIVO_SVR_ADDR"
Sorry for bumping this old post. But not much going on in here, and this has remained unanswered for over a year.