Bummer!!! I can't help you, directly, but perhaps I can shed some light on the cause of your problem (perhaps for your benefit and that of others ...)
Ralph Lauren Paints have been 'complained' about notoriously. I hear of VERY few success stories with their paints and methods of application. So I don't recommend this brand when attempting 'exotic applications'. You need to search-out what works well and hear it from someone OTHER than a Ralph Lauren salesperson.
Prep-work goes a long way. SOmetimes, 2 coats of Primer/Sealer are needed, especially for novice painters. (The Pros know all the short-cuts and tricks.) Anyways, buying a HIGH-quality Primer/Sealer (as well as finish paint) goes a long way, especically when you're only talking about a few $$$ when it comes to a washroom. One should never skimp on material because you may get what you pay for.
And lastly, even using the best of paints can prove disasterous. The paint needs to be THOROUGHLY mixed, the walls/room needs to be dry, AND the temperature needs to be just right. Although this may sound silly, one should read the Instructions on the paint can WHILE STILL IN THE STORE to see if it, and what's being painted, will meet their needs.
All that said, you may end up having to 'start over'. If you do, DEFINITELY Prime/Seal a minimum of 2 coats since the paint is Navy-colored. Otherwise, the Navy will 'bleed through' to your topcoat. And, expect a MINIMUM of 2 topcoats for novice painters. (Even I am not that good to get away with 1 coat.)
My best to you (and others) and hope this helps.
Jay J -Moderator
PS: GOd Bless America!