How are you testing?

The results you have ("33", "105") are characteristic of some sort of digital test reader. Unfortunately, these range from somewhat inaccurate, to wildly inaccurate. Drop count tests, like the HTH 6-way kit from Walmart or the Taylor K2006, are more accurate, and much more reliable, but give less precise numbers ("30", "110").

However . . . . cloudiness immediately after adding soda ash is almost certainly precipitated calcium. I can't be 100% sure, since you didn't report calcium levels, but it's still quite likely that calcium is the issue.

TC vs FC -- depends on how you are testing. If you test results are accurate, then you likely have high TC levels EITHER because you've used some algaecides or other products that react badly with chlorine OR, because you have missing stabilizer. This page ( http://www.poolforum.com/pf2/showthread.php?16973 ) how to do a bucket test to figure out what it will take to fix the problem.

Oops, we posted simulaneously! DEFINITELY, do the bucket test. That will answer the "how much" and "how long" questions you have. If you've converted 50ppm of stabilizer to ammonia, the answers will be (unfortunately) "a lot" and "a long time".