Limited access wireless internet on certain devices

Hi, I've been having a problem for a week or so, where my internet will drop and become "limited" on certain devices, I own two laptops 1 on W7 and 1 on W8 and a Blackberry (this will never drop connection unless the router gets reset) The two laptops experience "limited" it is not linked to doing one specific thing when it stops working. if I click disconnect and then connect it USUALLY will come back instantly sometimes have to do it about 2 or 3 times, this is extremely irritating while watching shows or downloading because if I don't disconnect and re connect it will stay on "limited" for however long until I dis&re connect. This doesn't happen to my laptops at the same time, meaning that isn't likely a router problem (BB is always connected) I'm actually surprised that it has actually stayed connected this long.

I was reading a similar thread, and it didn't solve my problem but I did attach the cmd and xirrus.

noted: Casa is the personal internet for us and "instantlawns" is for my roommates' business. also my other roommates' internet does a similar thing where it goes limited but nowhere nearly as often as mine.

Hi,
@Mrhiab No I didn't contact Rogers.
@2xg I've updated wireless drivers (my computer) but not the router itself. I've never had this problem until about a week ago.
Also I don't know how to "change channels"