Strange Railway rules

I was trying to book tickets in Tatkal category at 8AM using

ngpay  app on my mobile and I got this message: 

As per the railway rules you cannot book Tatkal tickets on ngpay
between 8AM and 9AM. Please try after 9AM.

Similar restriction is imposed on Cleartrip.

So, a consumer is bound to book Tatkal tickets between

8AM and 9AM, only on IRCTC.

What a mockery of competitive trade!

Not to mention that, despite being in existence for more than a decade,

IRCTC still sucks at its User Interface and speed.