How to interpret rclone's progress output

[mauricev]

What is the problem you are having with rclone?

The progress output is confusing and contradictory
Here is the output

Transferred:   	  486.181G / 926.373 GBytes, 52%, 13.589 MBytes/s, ETA 9h12m49s
Transferred:            0 / 1, 0%
Elapsed time:  10h10m36.0s
Transferring:
 *                                       bigfile:  7% /475.576G, 4.437M/s, 28h13m8s

I am attempting to transfer a single ginormous file. There are two sets of information regarding the same file above, and they are in complete disagreement
475.576G versus 926.373 GBytes
7% versus 52%
7%, which is 33.29G versus 486.181G
The file is actually 371.06 GB as reported by the Finder so there's that discrepancy also.
4.437M/s versus 13.589 MBytes/s

What is your rclone version (output from rclone version)

1.53.4

Which OS you are using and how many bits (eg Windows 7, 64 bit)

OS 10.14.6

Which cloud storage system are you using? (eg Google Drive)

Dropbox

The command you were trying to run (eg rclone copy /tmp remote:tmp)

rclone copy --progress /Volumes/external2/bigfile dropbox:

[ncw (Nick Craig-Wood)]

What has happened there is that the big file has had an error and been retried by the look of it.

The top speed is a long term average and it will come to match the bottom speed eventually.

I agree it is most confusing!