I have been using PortableApps for many years. Often it happens when I unzip a new one and I click on "finish", it does not automatically immediately start whereas it should, as I made sure the little thingie was checked.
This is a rather common phenomenon, so I guess not too many people feel disturbed enough by it to get it sorted out. In the end it isn't really important indeed. Just wanted to bring it to someone's notice, if it can be corrected, all the better.