[idvusers] Missing Time-Steps in directory mode

When I open a directory of grib2 files only one time-step apears, but, if i 
open the the files individualy they all have data for that paramater.

screenshot: https://www.dropbox.com/s/abzrp3opc4a2zbi/IDV_TIME_ERR.PNG?dl=0

I am using win7 x64 and IDV 5.4 x64 ... also affected by this with IDV 5.3

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