Write your own data step, and use that. With the automated helpers (either the import wizard of Enterprise Guide or proc import), changes in the data can (and will) cause unwanted changes in the structure.
If your original task runs a proc import, copy the data step code from the log, adapt (and simplify!) it is as needed, and use that in the future.
If values are imported wrongly, please supply example data from the csv file (use the [i] button for posting textual data), and tell us which column was incorrectly read.
Please show the REAL content of the csv file. It should look something like this:
RIC,Price,Volume
AEIS.O,14.07,1500
NEVER (and I mean never as in "not even when hell has frozen over so hard that the brimstone is superconducting") inspect a csv file with Excel or similar, as you will only see what Excel thinks of the data. Use a proper text editing/viewing tool, like notepad++.
Which import wizard do you use? That of Base SAS, SAS Studio, or Enterprise Guide?
Save $250 on SAS Innovate and get a free advance copy of the new SAS For Dummies book! Use the code "SASforDummies" to register. Don't miss out, May 6-9, in Orlando, Florida.