Bridge Sort by Filename Error

When I sort by filename in Bridge (version 13.03.693) it's not correctly sorting by filename for similarly named files. 

Examples:

01-image-03_1.tif 

01-image-03.tif

01-image-05.tif

01-image-05a_1.tif

01-image-05a.tif

02-image-01-alternate-1.tif

02-image-01-alternate-2.tif

02-image-01-alternate-3.tif

02-image-01.tif