Hello Rneill, after reviewing your account it appears the monthly data usage was exceeded, which results in slower speeds until your next refresh date. I noticed on your account you had called in for help, and since you were not home they added data onto your account and ran a speed test showing you were getting good speeds.
Please visit http://hninfo.us/FApolicyGen5 for more information regarding our data usage policy, and if you need help managing your data usage please visit here http://hninfo.us/datatips.