Inconsistency in zoneinfo binary files?

Hi, I hope that this is the right list to ask this question: I am having trouble in comprehending the zoneinfo binary files: I have a version 2 file for Amsterdam which gives me 180 transition times and 13 transition types in the first block (all of which look fine to me). But the second block yields 181 transition times and 14 transition types. The additional transition time is 1971-02-07T06:08:44, which seems rather weird to me. Regards, Roland