New
#1
Could be you have the multiple display option turned on.
Right click on the taskbar and select “Settings” to display the “Settings > Taskbar” menu. If the Multiple display option is turn On, switch it Off.
I'd say you should go to your computer maker's support site and download then reinstall the display driver [even if it is the same version as the one you have now].
While you're there, check for a Bios update.
Denis
I too have Win 10 Home but no multiple taskbars. Sorry cant help but win 10 has been 'strange' lately - what is MS up to?