Inconsistent improvement on Swedish Course answer logging by Memrise

The same error exists on Comprehensive Swedish Course and after I said on line and forum that it does not work and does not score my correct answers on the machine I am on, it did improve as I learned new words and numbers and scored me 29 which I do not understand and also logged more points. But then I tried Classic review again and the same happened, questions about words I had passed and entered correctly before.I cannot use the site apart from to do new learning and use self check methods apart from Classic review due to a bug or someone incorrectly saying I give no correct answers when the green light behind the answers I give shows them to be correct in the main. Tracy Allott Barnsley Yorkshire (this happened last week too in Priory Campus a community centre on their computers that learners can use).