Tax Deferred Calculation

Hi I am a new user.

On looking at the tax deferred reconciliation I notice that the tax deferred amounts received from distributions are not discounted (yet they do affect the cost base, ie reduced cost base).

Is there a reason why it is not discounted?

Also prepayments not included in this calculation - where have deducted the full amount in the year of payment but where accounting expense is allocated over the period of payment.

Hope someone can help.