Same card three times in a row : strange ? (Grades sequence : 0 -> 1 -> 1)

[unpeulent]

Hello,

I've been using Mnemosyne for a month (and I love it !), each day, to
learn Spanish vocabulary (I currently have 600 cards. I append a pack
of 100 cards from time to time).

There's a behaviour of Mnemosyne that I don't understand :
(1)
Mnemosyne shows me a card. I don't know this card (or I don't remember
the answer at all, if Mnemosyne already showed it to me before) so I
use the "0" grade.
(2)
Then the next card is the same one.
I then use a "1" grade, because I "know" the answer (Mnemosyne showed
it to me a few seconds before ...) so I don't think I should use a "0"
grade, and I don't want to use a "2" grade because I'm certain I won't
remember the answer even only 10 minutes later !
(3)
Then Mnemosyne shows me the same card immediately afterwards.
I still don't want to use a "2", so I use a "1".

So the sequence of grades for this card was : 0, 1, 1.

I don't understand this sequence of three cards in a row. Do you ?
It happens quite often (say, once a day, sometimes more).

Wouldn't it be more logical if Mnemosyne made less probable (I'd like
to write "impossible" instead of "less probable" !) for the same card
to appear twice in a row, and made even less probable to make it
appear three times in a row ?

Or I am the one who must change his behaviour ? (how ? Grade "0" then
"0" ?...)
What would be your behaviour in this situation ?

Thanks
Michaël

[Peter Bienstman]

This behaviour is fixed in the 2.0 code. Of course, the fewer new
cards you have to learn, the smaller the interval between repetitions
of the same card becomes. So, always make sure you have plenty of new
cards to learn, and perhaps increase 'number of grade 0 cards to learn
at once' a bit.

Cheers,

Peter