In Exodus 30:22-23 (KJV) where it talks about the anointing oil, are the sweet calamus or fragrant canes actually cannabis? I tend to think not, but in some ways to me it makes sense. Also a few other scriptures lead me to think that it was cannabis, like Genesis 1:29-30, where it talks about God giving us every herb bearing seed for meat.

No, the similar sound (calamus v. cannabis) is merely coincidental--though I can imagine some Bible readers having a motive for identifying the two!