Entering notes from a midi keyboard. I’m hearing two notes.

I enter notes onto my score using a midi keyboard. ( turn the sound off on my midi keyboard) all sounds are coming from the computer)
I write trumpet scores. My trumpets are BFlat instruments.
Up until this morning when I pressed “C” on the midi keyboard I would hear Concert pitch “Bflat” from my computer.
If I pressed “Eflat” on the midi keyboard I would hear concert pitch “DFlat”

For some reason I am now hearing two note sounds and this is messing with my brain.
When I press C on the midi keyboard I had a Concert pitch BFlat and Concert pitch C