@michmoor Thanks so much for the response. After further digging, it turns out that I was just being dumb and not paying attention to what I was doing. I was jumping from adapter to adapter, connection to connection running around the building with my laptop. I didn't realize that the dock I had plugged into left me wireless.
Once I figured out I was chasing my tail and wired myself, I was able to all but max out the connection at 35MB/s. I also looked and one site is 500/500 and the other is 300/300., so the 35MB/s makes complete sense.
With that said, I'm going to bump up the second site to 500/500 on Monday. Any suggestions on how to pair the IPsec settings with the settings for the cryptographic hardware?