Why does script for adding a day to last day of month which is Friday fail to give correct output?

Issue

• The following script is to add a day if next day is Sat or Sun, its giving us 02/Nov/2014 while output should be 03/Nov/2014

#!/bin/bash
CurrDateValtest=20141031
NxtDateValtest=`date --date="$(date -d "$CurrDateValtest")+1 day" '+%Y%m%d'`
NxtDaytest=`date --date="$(date -d "$NxtDateValtest")" "+%a"`
echo "Next Day value is $NxtDaytest"
if [ $NxtDaytest = 'Sun' ]
    then
    NxtDateValtest=`date --date="$(date -d "$NxtDateValtest")+1 day" '+%Y%m%d'`
    echo "Displaying next day value after adding as --> $NxtDateValtest"
else
    if [ $NxtDaytest = 'Sat' ]
    then
        NxtDateValtest=`date --date="$(date -d "$NxtDateValtest")+2 day" '+%Y%m%d'`
        echo "Displaying next day value after adding as --> $NxtDateValtest"
    fi
fi

• This problem is only prone to last working day of month if that happens to be a Friday.