NAT Setting - Virtual Server error

[chrus]

I think I found a nasty bug:

Yesterday I added one after other some rows of my "server-applications" in the "Virtual Server List", everything seems OK (FW 1.7.5.6-2 Oleg).

Today I was changing some lines (deleting the row to change and adding a new one). But after the deleting the rows "got in tilt": this means the description, the port, ... of the table was mixed up and nothing was right.

The only way to get a correct VSL was to delete all the rows and enter them one after other without deleting one.

Today I upgraded to FW 1.7.5.6-3 from Oleg, but everything remains like this. I wouldnt go back to the original FW 1.7.5.6, because I need the printer feature.

How can this happen? Is this a bug? Would it be possible to directly change details of a row (not delete and re-enter)?

PS.: I hope it is not a Javascript-HTML-Frontend-Problem.
Thank you for every help...