Once you create an index score, the calculation of counts can get really confusing. Let's start with an example:

We have 3 respondents:

 respondent id scale1 scale2 index weight 1 1 1 0,75 2 2 2 2 1,5 3 3 2 2,5 0,75

UNWEIGHTED:

Once you calculate the mean of the index score, you will get a final result of 1,8 based on 3 respondents (base size).

However, once you calculate a count it will just give you the result of all 1, 2, and 3's given:

 1 2 3 Count 1 3 1

This calculation is based on a total count of 5 (1+3+1 = 5, which is the base size)

And, once you calculate a percentage share it will just give you the result of all 1, 2, and 3's given:

 1 2 3 percentage share of index 20% (count =1) 60% (count =3) 20%  (count =1)

This calculation is based on a total count of 5 (base size is 5) too.

WEIGHTED:

Once you calculate the mean of the index score, you will get a final result of 1,88 based on 3 respondents (base size).

However, once you calculate a count it will just give you the result of all 1, 2, and 3's given:

 1 2 3 Count 0,75 3,75 0,75

This calculation is based on a total count of 5 (0,75+3,75+0,75 = 5, which is the base size)

And, once you calculate a percentage share it will just give you the result of all 1, 2, and 3's given:

 1 2 3 percentage share of index 14,3 % (count =1) 71,4 % (count =3) 14,3 %  (count =1)

This calculation is based on a total count of 5 (base size is 5) too.