Hi,
you have paid demand under wrong type of payment
you have paid under Advance tax (100)
it should have been paid under Regular assessment(400)
that is why it is still reflecting in your site.
time limit to get type of payment option rectified. is 3 months.
you can contact your assessing officer who is authorized under the departmental OLTAS application to make such correction in challan data in genuine cases, to enable correct credit of the taxes paid, to the concerned assessee account.
or else you can make fresh payment by choosing relevant assessment year and 400 -payment option