Upgraded Internet

I just upgraded my internet from the preferred (50mbps) to the premier (100mbps). I just checked the speed and it is now lower than it was before...it was at a stable 60 mbps before and is now around 32 mbps? Also the promotion said it would be an additional $5 a month...I just checked the price on my account and it is showing 71.99/month without the modem when it was 56.99 before with the modem. Really confused here if anyone can help that'd be great!

Thanks