NTP Issue - Time Jump

Well this has happened again even using Netgear's NTP servers:

Sep 22 10:37:25 DESPAIR connmand[5538]: ntp: adjust (jump): -464693790.406618 sec
Jan 01 00:00:54 DESPAIR systemd[1]: Time has been changed
Jan 01 00:01:16 DESPAIR readynasd[5804]: UpdateRRDVolume failed: ERROR: /run/readynasd/stats/volume_data_int.rrd: illegal attempt to update using time 1041379276 when last update time is 1506073007 (minimum one second step)
Jan 01 00:01:16 DESPAIR readynasd[5804]: NetworkStats eth0 failed: ERROR: /run/readynasd/stats/network_eth0_pkts.rrd: illegal attempt to update using time 1041379276 when last update time is 1506073007 (minimum one second step)

Jan 01 00:01:17 DESPAIR readynasd[5804]: NetworkStats eth1 failed: ERROR: /run/readynasd/stats/network_eth1_pkts.rrd: illegal attempt to update using time 1041379277 when last update time is 1506073007 (minimum one second step)

Jan 01 00:01:18 DESPAIR readynasd[5804]: UpdateRRDTemperature failed: ERROR: /run/readynasd/stats/temperature_int_deg.rrd: illegal attempt to update using time 1041379278 when last update time is 1506073007 (minimum one second st
ep)
Jan 01 00:02:26 DESPAIR smbd[1185]: pam_unix(samba:account): account mark has password changed in future
Jan 01 00:05:01 DESPAIR CRON[1215]: pam_unix(cron:account): account root has password changed in future
Jan 01 00:05:01 DESPAIR CRON[1215]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 01 00:05:01 DESPAIR CRON[1219]: (root) CMD (/frontview/bin/fvbackup 008 &> /dev/null)
Jan 01 00:05:01 DESPAIR CRON[1215]: pam_unix(cron:session): session closed for user root
Jan 01 00:05:01 DESPAIR fvbackup-q[6256]: Command: enqueue:8
Jan 01 00:05:01 DESPAIR fvbackup-q[6256]: write(/var/log/frontview/backup/status_backup_008,BACKUP_STATUS__IN_QUEUE!!1041379501!!OK)
Jan 01 00:05:01 DESPAIR fvbackup-q[6256]: Push: job_id=8 q_wp=338 q_rp=338
Jan 01 00:05:04 DESPAIR fvbackup-q[6256]: cmd=/frontview/bin/fvbackup -e 8
Jan 01 00:05:04 DESPAIR fvbackup-q[6256]: Create a readonly snapshot of '/data/ADMINISTRATION' in '/data/._share/ADMINISTRATION/.snapshot/b_1041379504_1226'
Jan 01 00:05:12 DESPAIR fvbackup-q[6256]: Delete subvolume (no-commit): '/data/._share/ADMINISTRATION/.snapshot/b_1041379504_1226'
Jan 01 00:05:12 DESPAIR readynasd[5804]: Successfully completed backup job Backup008 - ADMINISTRATION.
Jan 01 00:06:50 DESPAIR smbd[1252]: pam_unix(samba:account): account mark has password changed in future
Jan 01 00:17:01 DESPAIR CRON[1357]: pam_unix(cron:account): account root has password changed in future
Jan 01 00:17:01 DESPAIR CRON[1357]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 01 00:17:01 DESPAIR CRON[1361]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Jan 01 00:17:01 DESPAIR CRON[1357]: pam_unix(cron:session): session closed for user root
Jan 01 00:17:59 DESPAIR connmand[5538]: ntp: adjust (jump): +464693784.776433 sec
Sep 22 10:54:24 DESPAIR systemd[1]: Time has been changed

Please can something be done to prevent this moving forward!