This is more along the lines of a design flaw rather than a real bug:

It would help greatly if large numbers (<999) had commas. For example: 35,000 instead of 35000.

For Million Milers: 1,443,503 instead of 1443503

The old snail mail monthly statements used commas until the late 1990s, then they seems to have disappeared.

Long lists of large numbers (such as in a monthly statement) are always more easily read with commas.