RFI French Sat/Sun on 15455/21620 kHz, instead Mandingo Mon-Fri

FRANCE   RFI French Sat/Sun on 15455/21620 kHz, instead Mandingo Mon-Fri:
0800-0830 on 15455 ISS 500 kW / 198 deg to WeAf French Sat/Sun
0800-0810 parallel on other RFI frequencies of French Service, BUT
0810-0830 not parallel on other RFI frequencies of French Service:
0800-0830 on 13695 ISS 500 kW / 204 deg to NWAf French
0800-0830 on 15300 ISS 500 kW / 195 deg to NoAf French
0800-0830 on 17850 ISS 500 kW / 160 deg to CeAf French
0800-0830 on 21580 ISS 500 kW / 155 deg to CeAf French
But no signal of Radio France International on Jan.16:
1200-1230 on 21620 ISS 500 kW / 198 deg to WeAf French Sat/Sun