I'm usually good at this stuff......

[duraleigh]

You must bring your pH back down. I cannot say why it went up (Is your Alk still 110) but, regardless it needs to be in the mid to low 7's for your chlorine to be effective.

Test your water for pH and Cl tomorrow AM and post those results.... be prepared to put in more muriatic....it won't hurt your pool and you MUST get your pH down into an acceptable range.

How much Cl was in your pool prior to shocking? Any? You needed 7.5 gallons of full 6% to get to 15ppm if you had none prior. You had to have at least 5ppm of FC for 5 gallons to get you where you needed to get.