That is due to improper seating of the bead, or running too low PSI Homie!
I use 25 psi to seat the beads, after I cleaned the bead surface of the rim up. They make bead sealer to put on , but that makes it soo much harder to remove the tire the next time , but they will not pop off!
Oh one other piece of advice, leave the tires sit in the sun for an hour to soften them up make it much easier to work with and will help with sealing it up!