#1
I am a little confused on these.

Can somebody explain why like for a C Ionian it is C D E F G A B,

And then for a C Dorian, you lower the 3rd and 7th? I think the Dorian should be D E F G A B, but thats wrong because a C dorian is C D Eb F G A Bb.
#2
D Dorian is... D - E - F - G - A - B - C.
D Dorian is in the key of C major.

C Dorian is... C - D - Eb - F - G - A - Bb.
C Dorian is in the key of A#/Bb major.

C Dorian and C Ionian are not in the same key.
#3
When I learned modes I thought of it like this, C Ionian in CDEFGABC, D dorian is a mode of C Ionian so it has all of the same notes DEFGABCD. I made a little chart like this:
C Ionian CDEFGABC
D Dorian DEFGABCD
E Phrygian EFGABCDE

It probably won't help you but thats how I got modes down.
SPAM
Stock Gibson Pickups from a 2005 V, I think they're a 498T and 500T set FS/FT
Duncan Distortion (regular spaced) FS

Looking for: an acoustic, recording gear, or $
#5
C Ionian and A Aeolian are in the same key. A is C's relative minor. A's relative minor is F#. The relative minor is the sixth mode, Aeolian.
SPAM
Stock Gibson Pickups from a 2005 V, I think they're a 498T and 500T set FS/FT
Duncan Distortion (regular spaced) FS

Looking for: an acoustic, recording gear, or $
#7
Quote by Ascendancy5
So C Aeolian and A Ionian are in the same key?
C Ionian and A Aeolian contain the same notes. A minor is considered the relative minor of C major.