Had a look at the FDR link posted above but I'm no expert...
It looks like something happened during the first encounter that caused the aircraft to exit the enclouner rolling right wing down. After 10 or 12 seconds it's 25 degrees down and during this time the heading changes 15 degrees.
This seems rather a long time without corrective input or is it an attempt to let the plane fly out of the wake zone?
Then at 9:15:50 (one sec before the second encounter) the filtered stab position (not filtered elevator) seem to go down a tad without a corresponding control col input. Could someone explain what this is please?