I like to contribute to all projects however lately there are many mathematical projects with a lot of work units and I prefer to contribute to other projects, so I have set up in BAM projects recource share of 10000 to non mathematical projects and a 100 to mathematical projects. However, most of the work units I get are from mathematical projects, what I am I doing wrong? Can someone help? Thanks,

My experience over the last months is similar. However, it seems that many of the bio science BOINC projects just don't hand out work regularly.
Add some of the others that encounter occasional hiccups, and you get a lot of tasks in the field of mathematics.