continued shuffling of songs on iPhone 6
my iPhone 6 shuffles sons on a playlist even though "repeat" and "shuffle" were turned off when the songs were synced from iTunes and neither repeat nor shuffle are selected on the phone. i have reset the phone settings and reinstalled software and re-synced the music to no avail. any suggestions as to how to play songs in sequence? i have the latest software on iMac and iPhone.
iPhone 6 Plus, iOS 11.1, 11.1.1