Mac C40 Studio Fix Powder

OK I finally got officially foundation matched by a MAC MA the other day. She matched me with Studio Fix Powder in C4- on application it looked good but it did shift a bit and turned orange. Then I tried NC40- she says it's more beige than C line. Did the same thing but upon application the tone was off not enough yellow. Then I wanted to try out C35- she says this is too olive-green toned for me and NC35 would be better since she thinks I have more of a golden beige skin tone ( plus it was the color I used in the past- pretty good match but not enough yellow for me. )
OK here's the question- if she originally matched me up with C4- is it that much different than C35? I thought C35 would have been a better match since it seems like the NC line doesn't have enough yellow or is C35 much more 'Olive' than C4?
Side by side it doesn't look that much different- I was too tired to try out C35 and just got NC35 but should I really have gotten C35 instead and not listen to the MA and trust my instinct?
TIA!