Wrong order whit ms

The order of message is not correct ,is there any way solve this issue?
below is search message sort by timestamp but get wrong order messages:

graylog-server verstion:2.4.6

and I try to sort it by field “offset” but get other problem, that’s not support sort by field offset…
image

issue has been resolved. the reason is :there is some empty indeices.after delete them ,sort query is ok.

I’m not sure…
If you check it the graylog processed the messages at the same time.
You can’t do anything. Nothing provide a sorted process.