Sample list in Attribute Column Chart incomplete

[iimog]

The list of samples in the Attribute Column Chart lacks entries with exactly two samples. This happens both in the tooltip and in the Sample Distribution box on the right hand side.

Here is a minimal example to demonstrate the bug:

1. Load this biom file into Phinch.
2. "Proceed to Gallery" > "Attribute Column Chart"

When hovering over a bar or extending the Sample Distribution box the list for 7 is empty. The two samples: animalia (0) and fungi (1) are not listed while the list for 8 has the correct entry plantae (2).