Bergger BRF100 Rodinal times?

[unibonded]

I have a roll of Bergger BRF100 to process, I've had a look at the recommended developing times at here but I'm a tad confused... I was going to use Rodinal but the suggested times are 6 minutes at 1+25, 5 minutes at 1+50 - so it's recommending a shorter time for a weaker solution - how can that be right?! :confused:

Has anyone processed this film with Rodinal 1+50? Any recommendations for timings?

Thanks for any help