Memrise score chart error

I have tried studying Swedish on line for a few months and use library or computer centre computers. Last week and now this, using Priory Campus center computers which are free, the score keeps slipping and wheras the green light shows on the correct answers I give, showing they are correct, the correct answer score box says only one or two or three correct when I get 9 or 10 correct on Classic review self test. It scores me on accuracy but not on timing. I have reported this as a bug before but it has happened again despite another bug report going in about scoring me down on Comprehensive Swedish Course.