Indian Railway Catering & Tourism Corporation [IRCTC] — online ticket booking experience

I tried booking tatkal tickets for my parents today through irctc. Once at 10 for ac which got completed and i got waitinglist tickets. Then at 11 in same train for sleeper. During both the transactions, site was extremely slow and loading data was taking a long time. When i clicked on net banking payment option and selected bank name, i never got the next page. Page refreshed each time to bring me back to the same option. Despite saving basic details in my account prior to this transaction today, tickets finished in a matter of seconds. I have been able to book tatkal tickets on the site before with lesser difficulty than today. Is the site not able to take so much load at a time only for me and others are able to book their tickets entering all details within seconds. Even counter tickets take more than a minute. Are agents involved in booking multiple tickets?