Do you know what ICU means ?
Al Shabaab had only 9 seats out of 94, and they werent AQ during ICU, also dont understand whats the context behind that single page you linked it doesnt even have a date like a year of when this happened, most of ICU abandonned the fight against TFG cause they didnt want the US to bomb the shit out of everything, Shabaab were one of the only courts that refused to stop fighting so they did their own thing and most ICU fighters who also still wanted to fight just joined Shabaab, they went from a few hundreds to 2500 by 2009 and then around 5000 today
ICU was very diverse in ideology you had Salafis fighting alongside Sufis, you also had Somalis from all over Somaliweyn from Djibouti to NFD who fought for it, it was basically a united Islamic front against the warlods and they succeeded and united the whole south under them in a few months