no, it is not normal (i say that, but im in the uk, with different brands, maybe wilton is really that different, but i dont think so). id be taking ti back to the store for an exchange.
xx
Do you mind sharing what recipe you use to make your own? Thanks 
I'm quite new to gumpaste but I've used Edna's recipe on YouTube (tonedna1) and it's great. It makes a lot though so I halved the recipe (also my mixer is quite small).
HTH 
If you don't want to totally make it yourself, you can get Wilton's gumpaste mix. You just add water to it. For me it's easier than trying to find Tylose powder.
to paint you can use straight colours, but they will take ages to dry. you can dilute down the colours with alcohol, like extracts or vodka, or mix lustre/ petal dusts with alcohol too. the alcohol dries fast and evaporates so there no alcohol left behind.
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on the back of the gum tex can it say's 1tablespoon wilton gum tex 4 cups con sugar, 1 heaping tablespoon wilton glucose, 4 tablespoons water, in large bowl conbine gum-tex with 3 cups of con sugar, make a well in the center and set aside conbine water and glucose in a glass measuring cup, heat in microwave on high for about 30 sec until mixture is clear, pour into well of sugar and gumtex until well blended mixture will be very soft. place mixture in plastic bag and seal tibgghtly let rest room temp 8 hours knead remaining sugar into gum paste when you are ready to use it will whiten you can add crisco to keep it soft and pliable
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