semi gloss not covering
By the sounds of it you should have asked, or better yet, the paint store you purchased you paint from should have warned you,,,,,,1 - Remove any gloss as preparation with borax, TSP and dry or prime.
2 - Yellow is a difficult color and should have been primed with a tinted primer regardless of who's paint you were using.
Now that you have started you have (2) choices, let dry what you have painted, go back to the paint store, especially where you bought the paint and have them mix up a tinted primer, to get you closer to your final color and then finish with your yellow paint.
Or just keep putting coat on coat untily you get a good finish.
When its all said and done there is usually more said than done
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