I'm a complete newbie so I'm not sure if this post belongs here or somewhere else.

I use the Jetpack Contact form on my website. After filling out the form and sending, another page comes up with a rather non-specific message: "Are you sure you want to do this?" and offers no choices for response.

Any ideas on the cause or what else I can do to further diagnose the problem?

Thank you!

www.selmarcerini.com

I avoid jetpack. try this, swap to the twenty fourteenand see if you have the issue,

2014 worked but Jetpack Contact Form continues to work intermittently which concerns me in that if I find some other Contact Form I may have an underlying problem that is only made visible now by Jetpack. I'll make a switch to another Contact Form and see what happens.

As a newbie, I'm not sure about locating the right Forum for various questions.

I'm reluctant to upgrade both ATAHUALPA and WORDPRESS to their current levels. I've been trying to find information on how to uninstall or go back to my current level in the event that the upgrades create any problems. Any suggestions on where I can find the answer?

Thank you!

First thisg you need to do is backup your site. This is something you should do
1) on a regular basis and
2) before you do any upgrade

I use the premimum plugin BackupBuddy but there are others. The three important things to backup are
1) your database
2) the wp-contents folder
3) wp-config.php
With those you can recover your site. You should also create a 'play' site so you can muck arround and blow it away and start over.

as for a contact form, I use another plugin called gravity form and never looked back.

Thank you very much! I will certainly follow those directions before I upgrade.

You mentioned a play site. Would that be a separate domain that is an exact copy of my production domain?

My play site is a subdomain of a domain I own and is not copy. A play site is just that for playing with different plugins, configurations etc. thus not a copy.