There is no way to tell looking at it if it is ok...That said, I am confident there is no Bacterial Safety issue with what you got. The only concern is, the guy gave a MIX of Cure, Salt and Seasoning and not Cure #1 aka Pink Salt. Regarding using TOO MUCH " MIX ", I would try to find out how the mix was made. Was it made at Max 200ppm or 120/156ppm as is common for Belly Bacon/Pastrami. Twice the max is still not Toxic unless you ate a whole lot in one sitting. The meat is probably be fine but something you want to be cautious with. See if you can get more info on the mix. Here is some info on toxicity...
With a single dose; the fatal dose of sodium nitrite is in the range of 22 to 23 milligrams per kilogram of body weight. To obtain 22 milligrams of sodium nitrite per kilogram of body weight (a lethal dose), a 154-pound adult would have to consume, at once, 18.57 pounds of cured meat product containing 200 ppm sodium nitrite (because nitrite is rapidly converted to nitric oxide during the curing process, the 18.57 pound figure should be tripled at least). Even if a person could eat that amount of cured meat, salt, not nitrite, probably would be the toxic factor.
For your and readers benefit...Curing meat is nothing to mess with unless you know what you are doing. It is NEVER a good idea to get a MIX and not follow directions. The Butcher say, " This is for 10 pounds.." Buy 10 pounds of belly or use Half the Weight of the mix if you have 5 pounds of meat...JJ