Ok, so I went to Walmart and they didn't have the HTH tester... only strips. So I took a sample to the pool store and got the numbers from them.... and now I think I completely wasted my time doing so.

The numbers I got from the pool store are:
FC: 0
CC: 0
pH: 8.4
CYA: 18
TA: 134


My drop test (which has everything but CYA) numbers are:
FC: too low to be measured
CC: too low to be measured
pH: 7.8
TA: 260

So now I don't know whats right? Should I shock according to their CYA level? Should I take it to another pool store and get another opinion?