Ordered 1gig plan with mirrored speeds because of Xfinity's recent 5-year price guarantee Promo. Upload speed capped at 100mbps

Hello,

I ordered the 1gig/1gig plan as part of Xfinity's new promo tiers. My upload is capped at 100mbps. My old plan gave me 150mbps.  I am wondering if the person that placed my order made an error.

Modem is an Xfinity Gateway.