firstly, welcome to the forum! i hope you enjoy your time on here and find it as helpful and informative as we all do!...also a bit of a laugh and joke with some great people!!
as for the paint, im not sure. i have never had this problem. to be honest i have always found the tamiya AS and TS range to be great and only ever needed one coat. it dosnt go on too thick or thin and for me seems to give a perfect cover ever time. Bunkerbarge used tamiya sprays quite a bit i think, he might have encountered this problem before and might be able to help you out.
here is my first ever use at tamiya sprays (im quite proud of it)
this is done in the tamiyas TS-44 "Brilliant Blue"
