Why Does Page Level Filter Override Visual Filter When Using TOPN?

[beau4powerbi]

I am not quite sure how (TOPN) works in my situation. Page level filter seems to be overriding (TOPN) visual filter.. why is this?

Visual filter

- I am filtering by the date table column called (WK_END_DT). There is one week end date for all days of a give week on the date table. I add (TOPN) to the (WK_END_DT) to filter down to only days in the current calandar week using (In_Current_Week) column. For each date in the date table it is either 1 or 0 for (In_Current_Week). 1 would me that the date is in the current week. 

Page Filter

- I add (WK_END_DT) which shows me all options. Once I select one option.. the visual will adjust to my new page level filter selection... overriding the (TOPN) selection.. which is what I want. I just don't get why it is working that way. Any help here? Page level filters don't normally override visual level filters, correct?

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as a note.. I thought this might be happening beucase page level filters override visual filters, but this is not the case in some situations. 

Say your visual displays sum of sales by state (ex. Michigan = MI) and you have sales for every state. You put a filter on that visual for state = MI. So now you are only seeing MI and the sales total. But if you then put a state filter at the page level.. and choose CA for califonia.. it will not override MI to show CA on the visual.. the visual will show blank.