I had the same issue with adjusting the range. The other issue I noticed is that some buttons in the Saitek Pro Yoke system stopped working after taking off – lights, landing gear, etc. All of these were working prior to taking off.
At landing, I activated APPR. However, the plane started to pitch up for no reason, Speed started to drop so I had to disengage the AP and land manually.
I’ve been flying the CRJ-550 at least three times a week an none of those issues exist.