Please do Help > System Info and report the exact version of LR and version of Windows or Mac.
Lightroom version: 6.2.1
Operating system: Windows 7
Someone in another thread has observed that, at least for him, LR 6.2.1 doesn't remember the last-used import preset, so you have to re-select it each time. Is that the cause of your issue, by any chance?
If not, then resetting LR's preferences often fixes things when the LR interface goes wonky: Resetting the lightroom preferences file - updated - Lightroom Forums
If that doesn't help, post a bug report on the official Adobe feedback forum: Recently active topics in Photoshop Family about Photoshop Lightroom
Finally, you can revert back to CC 2015.1.1 / 6.1.1: How do I roll back to Lightroom 2015.1.1 or Lightroom 6.1.1?. While 2015.2.1 / 6.2.1 fixes some of the serious problems of 2015.2 / 6.2, there are many still unresolved. Wait until Adobe cleans up the mess and others have beta-tested it.