Hard to see by the photo if that safty pin has the particular type of anti fouling tab that I specify in my post, I think minions photo had the wrong type, with a slope that leads the spring into the clasp, rather than the correct tab that is steep and will not do this, using the wrong safty pin will make a keep that quickly has problems,
nest the two picks and lead the two tips together into the spring at the end of the safty pin opposite the clasp, compress the pen spring when you get to the twist, allow the pair of picks to follow the 90degree turn of the twist as the compressed pen spring slides over the twist all the way so that is sets on the pair between the tensor bend and the twist.
Look carefully at what is happening if you are having trouble,
the pair should be nesting together, do not allow the back strap of the safty pin to come between the two pickshafts, this will not work and appears to be the reason that yours is unable to pass over the twist with them in it. you need to pull them out and reinsert them in your pinspring device, start from the coil end of the saftypin. this makes it easy to pin them on, if you put them on from the clasp end, it won't work very well.
Wake up and smell the Kafka!!!