Code position effects memory usage?

[Bill H]

I have a game I am making in pure Basic. I am writing it using a text editor and using labels for line numbers and then using zxtext2p to make a .P file. It has 550 lines of code that replicate 220 some data statements using LET and GOTO (referenced with a computed GOSUB). If this code is in the middle of my overall program I have 500 bytes of memory left, if I move it to the end, remake the.Pfile and reload I have 832 bytes of memory left. Why would I get more memory by moving the code?

Bill H