I found this information on the BC/YC FAQ thread here on the DIS,
There are two types of Junior Suites
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Deluxe Rooms at the Beach Club. Rooms 1557, 2557, 3557 and 4557 are considered 'type A's
1557 has they're really big Water View rooms with two Queen-size beds, sofa and chairs, dining table, TV armoire, dresser and full bathroom just like a standard room. 1557 has an outdoor patio, 2557 has a full balcony, 3557 has a standing-room balcony, and 4557 has a full balcony.
NEWS FLASH! ...i just found out from Disney that the King junior suites have 2 daybeds!!!! Just picture an extra daybed in the bedroom.
In 'Type B' Suites, french doors separate a cozy living room with a daybed from the waterfront King master bedroom, which also has a daybed in it. There are a walk-in closet and standing-room balcony off the living room. The room numbers are: 1501, 1647, 2501, 2647, 3501, 3647 and 4647.
You should be able to take the room numbers and find them on the floor plan link that I sent you. It appears that none of them are actually on the 5th floor. Of course the DIS'er who set up the YC/BC FAQ thread has not been around for any updates, so this could be outdated information. Hopefully Anne has something more current and I'll keep an eye out.
Tammi