retransmission the incorrect seq

edit

There are more weird things in this capture, but helping you analyze this issue is not really because:

• The capture was made on the webserver which has TCP segmentation offloading on. This means the packets in the trace are not exactly the packets on the network.
• You provided a screenshot instead of a capture file, this means most of the interesting fields are not available.

Could you please make another capture on a span-port towards the server? Anonimize it with TraceWrangler and then post it on a public fileshare like DropBox, OneDrive, etc for us to have a look at?