If you're using Bluelight mobile version this will happen. Don't know if there's a remedy for it besides switching to the full version of the site, which you can do if you go to the support forum, go into the stickied thread that had a link to the full version. Personally I hate the mobile version, and the deleting posts thing is really annoying, so I am always on full site even on my phone.
Yeah, it is a bit of a problem TBH. I would use the mobile version for speed related reasons too, but the lack of functionality (or difficulty in use) especially for moderating stuff means I just go desktop.