Your values seem odd. One extra IP is set to 0, and two extra IPs is set to 1, etc. I would expect the values to match, i.e. 0 extra IPs = 0, 1 extra IP = 1, 2 extra IPs = 2, etc.
As long as an IP can be selected for every integer in the set (e.g. [1,4]), removing them should function correctly because there is always a valid config option value of 1 lower.
I also see that your config option is not assigned to any package groups. Are you no longer using it?
In any case, it seems as though the credit-doubling issue may not be a bug with Blesta. If anyone is able duplicate it, then please describe steps in order to do so and I'll take a look again.