How long can I keep my Balsamic Vinegar?

[Oldvine]

Balsamic vinegar is aged. A few more years won't hurt it.

 

[CWS4322]

I have had a bottle that developed some kind of mold inside that settled along the bottom. It came out in chunks when I went to pour it on salad.

Were the "chunks" like floaties or where they solid? The vinegar with mother has like these "floatie" strands in it at the bottom...