1st time recording and using Humviewer questions

[6poundtest]

I'll include a snapshot from Humviewer to illustrate my 1st question. This is a snap from a recording being played back in HV. The right side of the SI, in all 6 recordings done that day, show a different clarity of the water column from the left side; there is no such difference in the playback when I review it on my 598. Can anyone offer any insight on what I'm doing wrong?
This is the supplied transducer mounted to the transom, just off center to the right side of the keel line. I'm pushing the boat stern first to keep my oar strokes out of the display.

2nd question, if someone were interested in taking a look at this recording to see if it looks the same on their unit or version of HV, what portion of the file or what file extensions would need to be sent along? I see folders with the recording number on it with various files and extensions in there, as well as DAT files and XML files. This recording is about 8 minutes long

3rd question: I marked various waypoints as I went along, simply to remind myself that there was something interesting there that I wanted to look closer at. I have the box to show waypoints checked but I don't see any indicators on the HV playback; what should I be looking for?

I'm using version 86 of Humview.