Hope someone here can help me. I've been searching the Internet for a week and consulting with my computer guru friend but still have no clear concept of what's happening to me. I'll try to make this story short but lots of detail to include, so please be patient with me.

I got new roommates recently and neglected to inform them that with my Wildblue Satellite Internet service, that I am limited to 12GB downloads in a 30 day period (their middle tier plan). One day a couple weeks ago, at almost exactly NOON, I received an email from Wildblue saying that I was "close to exceeding" my FAP usage. Again, at almost exactly the same time, my internet speed slowed to a crawl, then would not even load one page of ANY website nor could I access new email. (I now know that the "slowness" was actually Wildblue decreasing my speed due to exceeding the FAP usage. However, here's the reason why I'm actually posting this info.)

Before I knew that Wildblue had done the slowdown, I checked Zonealarm and it said that it had blocked 4,800+ access attempts. I checked the ZA log and under "Source DNS", there was website after website listed. I was afraid that I was being scanned and unplugged both the Wildblue modem and my router for about 3 hours. I ran all spyware/virus/etc checks. I uninstalled ZASS and then reinstalled it (hence why I cannot post a sample of that log). However since the reinstall, ZA is still blocking access attempts from 2 DNS sources: (1) vip-cdns.wb1.lrd.wldblu.net and (2) is from a second computer using the internet connection. I never saw this happen before the ZA reinstall.

Notes:
Windows Vista Home Premium
ZASS ver. 7.1.254.000
All anti-virus, anti-spyware, etc programs are up-to-date
Have run 3 separate rootkits detectors which found nothing

My questions are:

1. When Wildblue slowed my speed, did they do something that would've caused those 4,800+ access attempts that ZA blocked?

2. Why is ZA blocking an access attempt from Source DNS vip-cdns.wb1.lrd.wldblu.net?

3. Why is Wildblue trying to access my computer in the first place?

4. Why is a second computer in house trying to access my computer?

Before 2 weeks ago, I didn't know much about Wildblue's FAP so I have downloaded a bandwidth monitor to all the computers so we can keep up with it and avoid the 'slowdown' in the future. I just want to understand what happened and is happening with ZA and Wildblue. Can someone explain please?