Furthermore, any other cause for termination obligated them to one month's salary.

So what was the actual reason they gave for terminating your contract?

It sounds a little too good to be true that they would give you a months salary for terminating your contract for any reason. Most companies would say for instance not give you any pay if you were instantly dismissed for gross misconduct e.g. theft, violence in the work place, under the influence of drugs, etc.