Markers in Indices

Here is a simple index:

When activating the text symbols, it looks like this:

I've added some spaces before and after the marker symbols to clarify things.

As you can see, there are 6 marker symbols - at first sight.

In the lines 2, 4, and 6 the marker text is:

• openObjectId Test1.fm:1 998704
• openObjectId Test1.fm:1 998851
• openObjectId Test1.fm:1 998979

So far, so good. This was the easy part.

In the lines 1, 3, and 5 there are markers, too.

Question 1: What's the purpose of these markers?

And what's even more irritating, in the lines 1, 3, and 5 there are not only 3 markers, but much more:

The marker symbols overlap each other. Therefore, again I've added some spaces before and after the marker symbols to clarify things.

The marker text is:

Line 1:

• newlink Symbols
• newlink ๆ (Question 2: What's that symbol?)
• newlink Numerics
• newlink A
• newlink B
• newlink C

Line 3:

• newlink D
• newlink E
• newlink F
• newlink G
• newlink H
• newlink I

Line 5:

• newlink J
• newlink K
• newlink L
• newlink M
• newlink N
• newlink O
• newlink P

Question 3: What's the purpose of all these markers?