This seems like it should be a very basic question, but I cannot find an answer anywhere.
When writing in AUCTeX mode the auto-inserted paired quotation marks are now unbalanced. That is, when I type the double quote button, I get two backpacks and ONE single quote, rather than two backticks and two single quotes, as expected: ``' instead of the two '' after the backticks. (Sorry that looks odd...I couldn't get two backticks in two places without it converting into a code block).
Note that I do not have this problem in other modes. All other text entry modes have balanced quotes auto-inserted. And the problem under AUCTeX seems limited to quotes (I have not found any braces, parens, brackets or other pairs that are unbalanced).
This has happened in the past month, and I don't recall installing anything new that I thought would conflict. I have been trying to uninstall modes/packages/etc., changing my .emacs file, and other tweaks to fix the problem, or at least figure out where the problem arises. But so far, no luck.
If it helps, here are the list of minor modes running when I am editing a .tex file:
Enabled minor modes: Abbrev Anzu Auto-Composition Auto-Compression Auto-Encryption Auto-Fill Auto-Insert Centered-Cursor Column-Number Company Delete-Selection Desktop-Save Diff-Auto-Refine Diff-Hl Electric-Indent Erc-Autojoin Erc-Button Erc-Fill Erc-Irccontrols Erc-List Erc-Match Erc-Menu Erc-Move-To-Prompt Erc-Netsplit Erc-Networks Erc-Noncommands Erc-Pcomplete Erc-Readonly Erc-Ring Erc-Spelling Erc-Stamp Erc-Track Erc-Truncate File-Name-Shadow Flx-Ido Flycheck Flyspell Font-Lock Global-Anzu Global-Auto-Revert Global-Company Global-Diff-Hl Global-Flycheck Global-Font-Lock Global-Hl-Line Global-Undo-Tree Ido-Ubiquitous Latex-Math Line-Number Magit-Auto-Revert Menu-Bar Mouse-Wheel Prelude Prelude-Global Projectile Projectile-Global Recentf Reftex Savehist Shell-Dirtrack Show-Smartparens Show-Smartparens-Global Size-Indication Smartparens Sublimity Tex-Pdf Tooltip Transient-Mark Undo-Tree Visual-Line Volatile-Highlights Which-Function Whitespace Winner
(Geeze, that seems like too many. Maybe a topic for another question.)