There is no direct correlation between entrance point and exit point. However, a number of ships entering a jump point at the same exact instant will maintain their relative positioning. That is to say, a squadron of jump-capable fighters or a couple of cutters could jump at the same instant and still be safely in formation at the conclusion of the jump.
However, if two ships in a line jump seperately, there is no way to predict what their arrangement will be at the jump exit. They may still be in a line, they may be side-by-side, one on top of the other, or they may overlap.
Overlapping will cause instant disintegration of the overlapping matter, releasing enormous amounts of chemical energy in the form of heat and light, with plenty of collateral damage from the enormous release of energy.
Two ships of comparable size that overlap will be eliminated. If a carrier jumps onto a mine, the carrier may not be destroyed, but will contain within it a large spherical hole many multitudes times larger than the mine was itself, due to matter disintegration. Then again, the explosion could be so huge that the carrier could lose a significant portion of its mass and be no longer spaceworthy.