Problems in "once" mode

I found two bugs:

1. When I access one page two times during "once" mode, the second access is handled from cassette and not stored. During: "play" mode later, the second access is not played from the from cassette.

2. When I access one page three times in "once" mode the third access fails.

I don't have idea how to correct the problem in elegant way, so I attached only the tests.
I suggest not to lookup cassette in "once" mode.

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Maybe, the right way is to have configurable matcher "count", which can count same requests. 
* When the "count" matcher will be on, then the repeating requests will be considered different.
* Whe the "count" matcher wil be off, then repeating requests will be considered same.