All servers report back increasingly high pings?

[Sakeytheninja]

I'm wondering if anyone else has heard of this problem, has had it themselves, or can help me.
Basically, I've been playing KF for over a year now and have never had this problem before. I'm assuming it may have something to do with a change I made on my PC but I don't know what it could have been, considering that I believe the issue is network related.

Problem:
Started happening about 2-3 weeks ago. When I launch KF through Steam and check my favorite servers, I notice the pings are 200-300, where normally they are anywhere between 56-80. If I query the main list with all available games, all servers show up as 200-300+.
If I shut down the game and come back to it later, the pings on my favorite servers will be 600-1000 and the main list will reflect the same.

Troubleshooting done already:
- When I restart my PC or my router, log back into Steam, and launch KF the pings are back to normal. But then they progressively get higher and higher, especially if I leave the game and shut it down and then come back to it later.
- I did a speed test and my results were what they would normally be.
- Checked other games and had no issues.
- Checked streaming Youtube and other sites, seemed normal.
- Checked Firewall settings to make sure KF was being allowed (which it should have been originally anyway)
- Ran a virus scan and came back with nothing.

Notes:
ISP is Verizon FiOS
Location: Residential neighborhood Baltimore, MD
Two other PCs in the house:
PC A is a desktop that is rarely used, but is connected to the router.
PC B is a Macbook Pro that is used commonly by a family member on WiFi. However, every time this problem happens, I have checked to see how much bandwith they are using and normally they're just doing something like surfing Facebook or Youtube.

Any ideas? Thanks for any help or suggestions guys