why is displayed different in hole table than in hole callout?

why is displayed different in hole table than in hole callout? Hole callout displays "1/4 SCREW CLEARANCE" on 2nd line. "Hole Table displays .281 SCREW CLEARANCE" on 2nd line. Hole table also displays a diameter symbol but does not have on that line.

This is the Dimension Text for used for both.

THRU

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