Egad...
To humor you I did clear both cache and cookies and the intermittent problem persists. Thanks for "busying" me with a pointless exercise.
"Refreshing" the sign up page will sometimes take me to phone tools.
Edit (added info):
The URL that logging in produces when it's acting up: https://phonetools.cox.com/
The URL when behaving: https://phonetools.cox.com/#!/
To this point, reloading the page seems fairly reliable in getting me to where I want to go. If the problem is a mystery, kindly say so. If your advice is for me to clear history, cookies, or otherwise alter settings on my computer, please articulate how you believe this would mitigate the problem.
Thank you.
Edit 2: Clicking "Call History" after logging in to my account (Web Tools) replicates the problem... except the URL I get from there is:
https://phonetools.cox.com/history?type=all.
Same page urging me to sign up. Refreshing did bring up Phone Tools, but as has happened a few times, a red message: "We are currently experiencing technical difficulties to process your call history request" appears when I try to view my call history.
Again, I'm no techie but I don't think clearing cookies and cache will accomplish anything besides making me an active participant in propagating the illusion that this is being addressed.
Edit 3: Silly me for mentioning that refreshing the page brings up Phone Tools, now that doesn't even work.
Edit 4: I appear to be otherwise logged in to Cox when this happens because clicking any webmail link takes me to my inbox instead of a log in page.