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What does "1 consecutive" mean? Seriously, you can have 2 consecutive days, but how can a singleton of anything "follow one after the other in order", when there is no "other"?
This is the quantity of days you login on site in a row. When you complete 30 you earn a Enthusiast badge. For now you have no days in a row.
The word is just the same problem with "you have 1 messages". It's ugly but not important.