It seems you are setup correctly...

the B3647 WOT cells (>80kPa, >5000rpm) would be richer than stoichiometric (14.63), so semi-open loop will not affect WOT...

semi-open loop only enables for those cells set to stoich afr (0-75kPa, 0-2800rpm in your case);

semi-open loop uses STFT's to trim.