The SCR is per LNB. You have 4 SCR for 28.2e and also 4 SCR for 13e
You have to connect to previous tuner (daisy chaining). Which ever tuner is available for the satellite you want, "connect" to it but use a different SCR number (for that LNB). I fit is crashing, report that to the Blackhole Team, I'm sure they will fix.
Try the following:
28.2
A (SCR 1) < C (SCR 2) < D (SCR 3) < E (SCR 4)
13E
B (SCR 1) < F (SCR 2) < G (SCR 3) < H (SCR 4)
Which card is not working on Vix?