New Pages Inherit Permalinks of Existing Posts

I have an incredibly weird problem that’s been making me pull my hair out for the last week or so. My installation used to have a lot of plugins on it, 40+ to be exact because I was testing a bunch of stuff out at once. I’ve since removed all those plugins except for WooCommerce, WP Canvas Shortcodes and Yoast.

The problem occurs when I try to create a new page and then update it after its been created. For whatever reason after I make a new page and then update it, the permalink changes to one of the old posts with a similar sounding permalink.

For example, I might have a blog post with the permalink: new-dresses-for-fall-2015

Then I’ll make a page titled “Chic Dresses” with this permalink: chic-dresses. I’ll Publish the page, and the first time it publishes, it’s fine. But if I go back into the page to edit some text for example and hit Update. The permalink will change from chic-dresses to something like new-dresses-for-fall-2015-2.

I’ve turned of all the plugins, turned off one while leaving the others. I’m on the TwentyFifteen theme so it’s not a theme conflict and of course all this is happening on a localhost installation so I can’t even show anybody, just hoping at this point that someone’s experienced this besides me. I have a feeling it might be some leftover junk from one of the 40+ plugins, maybe a Security, or a Caching plugin or something?…but I can’t really be sure because they’ve all been uninstalled and removed now.