Order of precedence for options

[Mable Syrup]

Is there an order of precedence?  In my options file I have:

tvmode flashhigh,flashnormal,flashstd,flashlow,flashvhigh,flashhd

which gets me files at the quality/size I want most of the time.  If I want something better (and it's available) though, putting, for example --mode=flashvhigh on the command line doesn't seem to have any effect, neither does any mode listing in a pvr file, so I end up changing the options file temporarily.

Mable