Some of the online sites have become so ridiculous that I won't even bother trying to use them anymore. It sounds very quick and convenient to just "do it online," but when the systems are so convoluted or so frequently come up with errors that you have to retry and retry, it's just not worth it.
I tried online monthly payments for our PG&E (Pacific Gas & Electric) bill for a while, for example, but more often than not it would take three or four tries over the space of half an hour to get the payment page to load properly, then many times it would reject the card number for no apparent reason, or just say "Please try again later," at which point you waste another half an hour trying the whole process again.
I gave up and requested regular bills in the mail again so it now takes all of about one minute to write a check and shove it with the payment slip in an envelope. It's just not worth the hassle and extra time it wastes to try and use the online system to save a 49-cent stamp each month.
Online payments are supposed to be quicker and easier? Not always!