Think of the WPF&M options as (almost) a completely separate ticket.
You can use your WPF&M options on a day you haven't entered a park
or on a day you did go to a theme park.
You can use either a theme park day or a WPF&M admission as your first use of the ticket. (Note, the ticket is only valid for the 14 consecutive days after its first use, even if you haven't used all the entitlements at the end of that time.) Visiting either a theme park or a water park will start that 14-day clock.
You can continue to use WPF&M entitlements even after you've used all your theme park days (subject to the 14 day limit mentioned above).
The park hopper doesn't apply to WPF&M options. With or without the hopper option on your ticket, visiting more than one WPF&M option on the same day will use multiple admissions. You can also mix & match theme parks and WPF&M options on the same day. (Again, this can be done with or without the hopper option.) Doing so would use both a theme park day and the appropriate number of WPF&M admissions.
For example, if you start the morning at Blizzard Beach, then head to Disney Quest for a while, then head to Typhoon Lagoon, you'd use 3 of your 8 WPF&M admissions. If you later went to Epcot for dinner and fireworks, that would then use a theme park day as well. If you then wanted to head to Magic Kingdom for Extra Magic Hours, this is where you would need to have the hopper option on your ticket. (The hopper option is the only way to get into more than one theme park on the same date with a single ticket. Unlike the WPF&M option where you can use multiple admissions on the same date, you can't use more than one theme park day on the same date.)
OMG, sorry to write a book in response to a simple question! LOL, a simple question that was already answered, too.
