Looks like someone tried to add a bit of girth

[Tobus]

The buckles were probably changed when they added the additional strap. The other two would likely have been the old two-prong buckles and would not have matched. They are a pain to deal with as well. In fact, I changed out buckles and straps on a Cameron of Erracht kilt brought to me by a piper from 4th BN, Royal Regiment of Scotland the other week for just this reason. The kilt was old and still had the two-prong buckles.

The shiny replacement buckles were the first thing that leapt to my eye when I looked at the photos.

On that subject, though, I love the original two-prong buckles on my QOH regimental kilt. Yes, they're a bit of a pain to get the tiny prongs in the holes at the same time, but they sure do lay nice and flat. Modern buckles are lumpy and uncomfortable by comparison.

If you kept those original buckles that you replaced (or have others from previous replacements), I'd sure be interested in them!

*edited to add: for those who aren't familiar with them, these would be original style military buckles: