As in they should not teach is what I get out of that. I'm not sure what that has to do with singing in the choir. I'm not an expert on this, but when they say permitted to speak, I think it means women should not be teaching collectively if all possible.
"Let women keep silence in the churches" seems clear enough to me, but either way, nowhere does he say woman cannot clean the sanctuary.
In the OT, only the high priest was allowed in what could be considered the sanctuary, and in the NT, only men are permitted to be in the sanctuary during Mass, benediction etc., but woman are not forbidden to step foot in the sanctuary when necessary at other times, that idea is ridiculous.