Yeah - your 5x5 and 1x5 (and 3x3 / 1x3) are separate. Your goal is to scale each up to the record weeks and obviously what you can handle for 5x5 is a bit less than what one can do for 1x5. The only linked portion is the Wednesday 5x5 squats present in the volume phase which are based on your Monday weight just a given % less (generally around 15-20%).