I've watched us go from 1 to 0 lucids recorded today
I believe that would be my fault. When I initially coded my entire journal late last night, I noticed that there were no options in the "year" box. Since it wasn't possible to accurately record the dates of my dreams, I just left the dates on the default date and updated the counters. When I woke up this morning I saw that all but one of those entries had been removed due to bugs, and that the one which remained was set to today's date. When I updated my journal again this morning, I changed that entry to it's proper date (which was a long time ago), which lowered today's lucid count from 1 to 0.
No explanations for the second issue you mentioned, though

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or do we need to enter a lucid dream as one dream and one lucid?
This is the way that I did it in my journal. I got the impression from the PM you sent out earlier that this was the way you intended for us to do it. I think doing it this way makes the most sense, since the "dreams" and "fragments" counters do not specify being lucid or not. If they were labeled "non-lucid dreams," on the other hand, then it would obviously make more sense to make it so that a dream was either one or the other.
Actually, in order to avoid ambiguity and possible confusion in the future, it may be useful to have separate counters for lucid and non-lucid dreams, rather than a counter for dreams in general. In that case, it might be best to have 4 counters: lucid dreams, lucid fragments, non-lucid dreams, non-lucid fragments. Another question this brings up is whether it is useful to distinguish "full" dreams from fragments.
Anyway, I've just been sort of thinking out loud - what are some other people's thoughts?