Diana is mixing up two items. Svyset should be
. svyset v021 [pweight=v005] , strata(v022)

V191 is the wealth score for the household and is the number of standard deviations of that household from the mean of the wealth distribution. As such if a household is poorer than the mean, then its wealth score will be negative. V191 is not used in svyset but should be used as an independent variable in an analysis routine (e.g. regression). It can be recoded as Diana needs: into quartiles, deciles, terciles, etc. for use in tabulations. V190 is already recoded from V191 into quintiles.

Best regards,
Shea