[Hummingbird] CDN causing poor performance score

Hey there, I really like your tools! I'm just learning each of them and have come across an issue that I need some more insight about – when I run a website speed test through GTmetrix I get a F grade for parsing of JavaScript and most of the items are coming from the wpmucdn now. I have a screenshot that I can share if needed. Not sure if I have the CDN setup incorrect. Any insight and help is wonderful. Thank you! -Trent