Not a decoder issue, all about MC messing around with their head end systems.
Octo LNB; 2 by 2x4 MS; 2 by ES 5-2; Dedicated PSU for LNB, ES's, MS's; HD PVR 4P x 2; Explora 1; DSD 660; FSM
That is MC fiddling around again. I first noticed it in August on the Explora 3A I think and posted some screen shots at https://community.dstv.com/t5/EXPLORA/New-Explora-software-updates/m-p/19261#M1365
Explora 2A (primary) Explora 3A Secondary SLNB LMX501 Samsung S9 Samsung Tab
Channel numbers wrong, four digits long and channel order mixed up. Scrolling thru channels on remote with down button will go from 184, to 1228, to supersport 6, to E-tv. See to attached picture. Happens about twice a week. Channel group is on "My DStv channels". TV guide also shows the wrong channel numbers and wrong order.
Explora 1 decoder. Satellite settings are the default and not changed. Signal strength and quality are good for all 3 tuners. Premium package in South Africa. No xtraView. Only one explora decoder on LMX500 old smart LNB.
Rebooting decoder helps but is annoying to do everytime.