we must admit that we are not experts in these matters. www.a-kasser.dk should be considered as an price-guide to membership of an A-kasse, and therefor it is not every question we will/can answer.
However we have made a little research and it seem that every A-kasse demands 18 months full study (= 3 semester).
The fact that you have ECTS score over 90 (which is normally regarded as 3 semester study) obvisiously do not count here.
And we would be happy to hear if you find a solution..