I missed this, Thanks Cindy! So basically what you are saying is that I am Babying my Baby Spatulatas!
Actually technically the cover over the seedlings is not only for higher humidity (which as you said isn't that necessary) but also to protect against rain. I have no other place to put my seedlings, other than out in the open, and during rainy season I have had some of the containers flooded, killed the seedlings, plus the seeds that haven't germinated either floated off or got buried.
TTFN
Arvin