Yes, i have same issues with 5530/5930 released drivers, Win7 and AltDVB. TS stream corrupted after several switches btw multistream transponders. I make fixed 5930 driver - ISI selection fixed and look like no more TS corruption. https://sourceforge.net/projects/crazyscan/files/test/TBS5930-debug....
What is your signal level in the problematic device? For DVB-S2/16APSK 4/5 it should reach at least 11dB. Another problem (quite significant) is the maximum bandwidth of the USB bus in the TBS5930.
A long time ago, TBS produced a card only for the reception of the ABS-S standard for ChinaSat satellites. Does anyone know or remember the details about card ?