I read that paragraph at the top with my jw head on. Makes perfect sense to me.
They're spirit anointed so we should obey them. (scripture says be obedient to those taking the lead).
But they are imperfect (as is everyone) so they will make mistakes, (ie shout at someone sometime or have a wrong thought sometime) so we obviously make allowances for human imperfection as we would hope others would make allowances for us.
Tie that in with the scripture that talks about "considering those taking the lead and IMITATING THEIR FAITH" , job's a good 'un!
It's only if you're fully aware of ttatt that these things stand out as nonsensical. They're glaringly obvious to us, but we can't expect a mass wake-up cos it just ain't gonna happen. If you WANT to believe the gb are running the show under Christ's supervision then you'll iron any wrinkles out as you go. It's easy.