The combined studyview shows that the IPO13 gene has a 100% mutation frequency (in the mutations table). However, upon closer inspection, the mutations table does not take along profiled genes without mutations in it's calculation. According to the results view the actual mutation rate is 24% as there are multiple samples in the second study that are profiled but do not have mutations.

Study view of combined study with 100% mutation counts. See bottom of image.

Results view of IPO13 gene with 24% mutation rate