Historical: "Multiple Dates/Times" download option is buggy

After several tests of the "multiple dates/times" download feature on the "Historical" page (I set 24 rows for a passed by date, one for each hour starting at 00:00 and eding at 23:00) I'm sure the routine that's intended to save the data onto the disk is buggy:Instead of creating a separate file for each downloaded hour, only 1 or 2 files are created. In the log one can clearly see that the download saves subsequent hours into the same file, I assume the file's contents are replaced each time. It's not reproduceable for me if and when the routine switches to a different file, the results I got were different.When downloading using the "single date/time" option, the files are created as expected.I guess this is a minor bug only and relatively easy to resolve IMHO.I don't deliver further details since the problem is easy to see for anybody wanting to look into the problem.Andreas