static_transform_publisher negative average delay

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When I use static_transform_publisher to provide a static transform, the average delay is negative. My questions are: 1) Is this a problem? 2) If so, is there a reason it's doing this, and how do I fix it?

For example, when I run:

rosrun tf static_transform_publisher 0 0 0 0 0 0 /frame1 /frame2 100

tf_monitor shows:

RESULTS: for /frame1 to /frame2
Chain is: /frame1 -> /frame2
Net delay     avg = -0.0473741: max = 0.000169573

Frames:
Frame: /frame2 published by /static_transform_publisher_1301872460950178911 Average Delay: -0.0997857 Max Delay: 0

All Broadcasters:
Node: /static_transform_publisher_1301872460950178911 10.3418 Hz, Average Delay: -0.0997857 Max Delay: 0