Sorry dear, the 9th were indeed in the Ardennes/Alsace Campaign. Please see their various sites for this campaign credit. In fact it was after the divisions performance during the Battle of the Bulge that it was nicknamed "Old Reliables".
No offense meant, and this is where the confusion may lie, but the Battle of the Bulge doesn't just mean Bastogne, but refers to entire areas of Alsace and the Ardennes. For instance, The 540th were not in Bastogne, but further south and given credit for the BOB. The area and time period are quite extensive.
The 5th Armored entered the Hurtgen Forest area in late November and pushed the enemy back to the banks of the Roer River in very heavy fighting. On 22 December it was withdrawn to Verviers and placed in 12th Army Group reserve, but earned the Ardennes/Alsace Campaign ribbon, but were technically not part of the Bulge.
Proud Daughter of Walter (Monday) Poniedzialek
540th Engineer Combat Regiment, 2833rd Bn, H&S Co, 4th Platoon
There's "No Bridge Too Far"