I'm using EVP 3.1 for FS9 to add new callsigns to my ATC (airlines, airport, aircraft models, etc). I also used the accelerate voicepack option to make my ATC better in handling traffic at busy airports.
Now my problem is that while EVP did accelerate the pilot voices in the simulator, it gave me duplicate voices! So I have 2 Pilot 0, 2 Pilot 1, and so on! And what's more confusing is that the sped up voices say everything but only with the standard callsigns the sim has, while only the duplicate regular paced voices can say all the extra callsings I added! Why is this happening? I have troubleshooted in numerous ways, including restoring the voicepack to default and importing all my extra callsigns again, and it ends up staying the same

I'd appreciate if someone could help me understand why this is happening and how to solve it, even though I know FS9 EVP is no longer supported.
Thank you
Leonardo