Was this an upgraded site from 6.x? If so, the 6.x schema may have been different than the 7.x schema.

Nancy

Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

From: Richard Damon
Looking at my install of D7 .16 I see these fields as having a size of 16 (like the schema says), which means that some other module has altered the table schema directly, and then not implemented a hook_schema_alter function to indicate that it has done this.