Radio Sultanate of Oman on wrong freq.15140 kHz, November 25

OMAN   Radio Sultanate of Oman on wrong 15140, instead of 15145 kHz on November 25:
1140&1217 on 15140 THU 100 kW / 315 deg to WeEu Arabic, instead of 15145, good, BUT
from 1235 on 15140 THU 100 kW / 315 deg to WeEu Arabic or 15145 NO SIGNAL/TX IS OFF
Something`s always wrong at Radio Sultanate of Oman Thumrayt transmitting station!!
https://www.youtube.com/watch?v=EdjqBM4cMoM&feature=youtu.be
https://www.youtube.com/watch?v=_SEAP0wVKqc&feature=youtu.be