These are two different things:
2. His stepfather was a Muslim
2b. he attended a Muslim school for four years.
Obama's staff has said that 2b. is false. That he went to a Catholic school.
The paperwork for his school showed him enrolled as a muslim.
His staff had no credible excuse for this except to claim it as some kind of error.
Search for the January statements from 2008 by Obama's staff.
You do not have to be a Catholic to go to a Catholic school.
They accept everyone, to them, it is a way to get their parochial foot in the door, so to speak.
And according to obama’s own friends, he attended a muslim school before transferring to a Catholic school.
From discoverthenetworks.org:
“Obama’s good friend, the attorney and novelist Scott Turow, wrote that Obama as a child spent “two years in a Muslim school, then two more in a Catholic school.” School records show that when Obama attended Catholic school, he was enrolled as a Muslim.”