kbmMemTable index with negativ Values not working

[Dieter.Soergel]

Hello,
I still use Delphi 7 and kbmMemTable V5.52.

I tried an Index on Column with this values:

MyCSVMEmTable.AddIndex('PK', 'MyFloats');

natural:
MyFloats
2.17332172393799
-2.54788446426392
22.841100692749
-2.18307662010193
-21.6549758911133


After Index:
MyFloats
2.17332172393799
-2.18307662010193
-2.54788446426392
-21.6549758911133
22.841100692749

Any ideas how to have an Index, which properly sorts Floatvalues?

Thank you
Dieter