That would drive me crazy as well. I haven't checked the sale prices lately, but would it pay for you to get P11 now, and down the road (in say a few months) you upgrade P11 to PP11? I'm just wondering if doing it that way would save you some money, rather than outlaying $224.99 for PP11 now.
Edited to Add: OK, well I just checked, and it would actually wind up costing you (assuming it's during another sale) about $30 more if you bought P11 now, and then upgraded to PP11. The only good thing is, you would have P11 to play with for now, and when you need feel you're ready for the Fitting Room and other Pro goodies, you'll have been able to save up some more for the Pro version.
I know, I'm not making it any easier for you to choose, but it's something to think about.