Paid Apps did not install when I synced with Apple Configurator but can be seen under "Not on this iPad"?

Question

On the ipad I did as a test, under Apps>"Not on this Ipad" I can see the paid apps and install them from there if I tap the cloud icon. Is this the correct method? Why would it install this way but not from A.C.?
In Configurator the paid apps have a triangle with an exlamation point in it next to them, indicating I need a redemption code. They were abviously paid for by whoever orginally downloaded them but why when I try to put them back on the ipads does this happen?
(NOTE:The previous tech did a factory reset on every ipad before I came (thank you previous tech ) I am new to the whole apple configurator/sync cart deal.)

Answer 1

Thanks for responding but I had already done all before posting my question andI was all up to date and it still said what it said. I have a feeling it is a disk problem, sometjing in my hard drive and I may need a new computer as this one is almost 5 years old and I have had other issues similar to this where a missing disk need to be located and I have had to refragment the computer twice in the past year. I am open to any other suggestions